SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: php_network_getaddresses: getaddrinfo failed: Name or service not known
mysql error number: 2002
mysql version: unknown
php version: 5.3.6-pl0-gentoo
Date: 08.02.2012 @ 13:34
Script: /forum/login.php
Referer: