Strato服务器PHP Zend异常套接字

我正在尝试通过Zend使用PDO连接连接到数据库：

<?php
class Feuerwehr_Db extends Zend_Db {

    public static function factoryEinsaetze(){
        $config = array(
            'LOCAL' => array(
                'servername' => "localhost",
                'username' => "root",
                'password' => "admin",
                'dbname' => "einsaetze"
            ),
            'LIVE' => array(
                    'servername' => "rdbms.strato.de",
                    'username' => "U2340080",
                    'password' => "*****",
                    'dbname' => "DB2340080"
            )
        );
        return parent::factory('Pdo_Mysql', $config[Feuerwehr_Environment::getStage()]);
    }
}

服务器上的PHP版本是5.6，标准的mysql_connect工作得很好。

Zend希望密钥是“主机”而不是“服务器名”。默认参数设置为localhost，用于解释错误异常

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)' in /mnt/web024/d1/57/5707957/htdocs/Beta/library/Zend/Db/Adapter/Pdo/Abstract.php:129 Stack trace: #0 /mnt/web024/d1/57/5707957/htdocs/Beta/library/Zend/Db/Adapter/Pdo/Abstract.php(129): PDO->__construct('mysql:servernam...', 'U2340080', '*****', Array) #1.....