SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Link-ID == false, connect failed
mysql error: Can't connect to MySQL server on '83.220.144.13' (113)
mysql error number: 2003
mysql version: unknown
php version: 5.2.17
Date: 11.12.2018 @ 12:51
Script: /
Referer: