Error #1040 en la línea 54

SQLSTATE[08004] [1040] Too many connections
PDOException Object
(
    [message:protected] => SQLSTATE[08004] [1040] Too many connections
    [string:Exception:private] => 
    [code:protected] => 1040
    [file:protected] => /home/artemadr/public_html/backend/includes/config.php
    [line:protected] => 54
    [trace:Exception:private] => Array
        (
            [0] => Array
                (
                    [file] => /home/artemadr/public_html/backend/includes/config.php
                    [line] => 54
                    [function] => __construct
                    [class] => PDO
                    [type] => ->
                    [args] => Array
                        (
                            [0] => mysql:host=localhost;dbname=artemadr_web
                            [1] => artemadr_web
                            [2] => CPsimart*418
                        )

                )

            [1] => Array
                (
                    [file] => /home/artemadr/public_html/backend/includes/api/misc.php
                    [line] => 71
                    [function] => connectDB
                    [class] => Cfg
                    [type] => ->
                    [args] => Array
                        (
                        )

                )

            [2] => Array
                (
                    [file] => /home/artemadr/public_html/backend/includes/api/menu.php
                    [line] => 5
                    [function] => get_config
                    [args] => Array
                        (
                            [0] => portada
                        )

                )

            [3] => Array
                (
                    [file] => /home/artemadr/public_html/backend/includes/api/menu.php
                    [line] => 55
                    [function] => cook_menu
                    [args] => Array
                        (
                            [0] => Array
                                (
                                    [0] => Array
                                        (
                                            [data] => Array
                                                (
                                                    [attr] => Array
                                                        (
                                                            [rel] => 17
                                                            [target] => 
                                                        )

                                                    [title] => Quiénes somos
                                                )

                                        )

                                    [1] => Array
                                        (
                                            [data] => Array
                                                (
                                                    [attr] => Array
                                                        (
                                                            [rel] => 25
                                                            [target] => 
                                                        )

                                                    [title] => Contacto
                                                )

                                        )

                                )

                        )

                )

            [4] => Array
                (
                    [file] => /home/artemadr/public_html/backend/includes/api/menu.php
                    [line] => 84
                    [function] => cook_menu
                    [args] => Array
                        (
                            [0] => Array
                                (
                                    [0] => Array
                                        (
                                            [data] => Array
                                                (
                                                    [attr] => Array
                                                        (
                                                            [rel] => 
                                                            [target] => 
                                                        )

                                                    [title] => ARTEMADRID
                                                )

                                            [state] => open
                                            [children] => Array
                                                (
                                                    [0] => Array
                                                        (
                                                            [data] => Array
                                                                (
                                                                    [attr] => Array
                                                                        (
                                                                            [rel] => 17
                                                                            [target] => 
                                                                        )

                                                                    [title] => Quiénes somos
                                                                )

                                                        )

                                                    [1] => Array
                                                        (
                                                            [data] => Array
                                                                (
                                                                    [attr] => Array
                                                                        (
                                                                            [rel] => 25
                                                                            [target] => 
                                                                        )

                                                                    [title] => Contacto
                                                                )

                                                        )

                                                )

                                        )

                                    [1] => Array
                                        (
                                            [data] => Array
                                                (
                                                    [attr] => Array
                                                        (
                                                            [rel] => 
                                                            [target] => 
                                                        )

                                                    [title] => APERTURA
                                                )

                                            [state] => open
                                            [children] => Array
                                                (
                                                    [0] => Array
                                                        (
                                                            [data] => Array
                                                                (
                                                                    [attr] => Array
                                                                        (
                                                                            [rel] => 69
                                                                            [target] => 
                                                                        )

                                                                    [title] => Qué es Apertura
                                                                )

                                                        )

                                                    [1] => Array
                                                        (
                                                            [data] => Array
                                                                (
                                                                    [attr] => Array
                                                                        (
                                                                            [rel] => 70
                                                                            [target] => 
                                                                        )

                                                                    [title] => Programa
                                                                )

                                                        )

                                                    [2] => Array
                                                        (
                                                            [data] => Array
                                                                (
                                                                    [attr] => Array
                                                                        (
                                                                            [rel] => 71
                                                                            [target] => 
                                                                        )

                                                                    [title] => Noticias
                                                                )

                                                        )

                                                    [3] => Array
                                                        (
                                                            [data] => Array
                                                                (
                                                                    [attr] => Array
                                                                        (
                                                                            [rel] => 74
                                                                            [target] => 
                                                                        )

                                                                    [title] => Patrocinadores
                                                                )

                                                        )

                                                )

                                        )

                                    [2] => Array
                                        (
                                            [data] => Array
                                                (
                                                    [attr] => Array
                                                        (
                                                            [rel] => 
                                                            [target] => 
                                                        )

                                                    [title] => PRENSA
                                                )

                                            [state] => open
                                            [children] => Array
                                                (
                                                    [0] => Array
                                                        (
                                                            [data] => Array
                                                                (
                                                                    [attr] => Array
                                                                        (
                                                                            [rel] => 72
                                                                            [target] => 
                                                                        )

                                                                    [title] => Dossier de prensa
                                                                )

                                                        )

                                                    [1] => Array
                                                        (
                                                            [data] => Array
                                                                (
                                                                    [attr] => Array
                                                                        (
                                                                            [rel] => 73
                                                                            [target] => 
                                                                        )

                                                                    [title] => Imágenes
                                                                )

                                                        )

                                                    [2] => Array
                                                        (
                                                            [data] => Array
                                                                (
                                                                    [attr] => Array
                                                                        (
                                                                            [rel] => 86
                                                                            [target] => 
                                                                        )

                                                                    [title] => Impactos en medios
                                                                )

                                                        )

                                                )

                                        )

                                )

                        )

                )

            [5] => Array
                (
                    [file] => /home/artemadr/public_html/index.php
                    [line] => 26
                    [function] => load_menu
                    [args] => Array
                        (
                            [0] => 1
                        )

                )

        )

    [previous:Exception:private] => 
    [errorInfo] => 
)