SQL-DATABASE ERROR

Database error in application: No Link-ID, connection failed!
mysql error: Access denied for user 'dbuser202'@'89.22.104.247' (using password: YES)
mysql error number: 1045
mysql version:
php version: 5.2.17
Date: 20.02.2018 @ 14:43
Script: /gaestebuch.php
Referer: