SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): cannot use database db69990001
mysql error: Access denied for user 'mkemper'@'%' to database 'db69990001'
mysql error number: 1044
mysql version: 5.1.60
php version: 5.3.29
Date: 25.07.2016 @ 11:56
Script: /forum/index.php
Referer: