SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Connecting to 3.22, 3.23 & 4.0 servers is not supported
mysql error number: 2054
mysql version: unknown
php version: 5.3.29
Date: 04.05.2016 @ 23:13
Script: /rhwboard/thread.php?threadid=263172
Referer: