Error on line 75 in file /system/libraries/Activerecord/drivers/mysql.php

Point of failure:
VC_ActiverecordDriver::connect()

Message:
SQLSTATE[HY000] [2002] Connection refused

Trace:
0. VC_Routing::detect_current
1. VC_Events->fire
2. VC_EventsCallback->execute
3. Plugin_SEO->replace_route
4. Plugin_SEO->find_alias
5. VC_ActiverecordDriver->find
6. VC_ActiverecordDriver->connect