Internal Script Error

MV framework version 2.5

Error description: SQLSTATE[HY000] [1698] Access denied for user 'root'@'localhost'

Array
(
    [2] => Array
        (
            [file] => /home/users/s/secbun/domains/bh.kalgin.ru/core/builder.class.php
            [line] => 36
            [function] => instance
            [class] => Database
            [args] => Array
                (
                )

        )

    [3] => Array
        (
            [file] => /home/users/s/secbun/domains/bh.kalgin.ru/index.php
            [line] => 16
            [function] => __construct
            [class] => Builder
            [args] => Array
                (
                )

        )

)