SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Host 'sh4-22.1blu.de' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'
mysql error number: 1129
mysql version: unknown
php version: 5.3.10-1ubuntu3.19
Date: 28.07.2015 @ 10:19
Script: /thread.php?threadid=87930
Referer: