SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Lost connection to MySQL server at 'reading authorization packet', system error: 0
mysql error number: 2013
mysql version: unknown
php version: 5.3.3-7.3+hw2
Date: 31.08.2014 @ 05:13
Script: /wbb2/index.php
Referer: