Since install I get Cron errors

My sites been running great till yesterday, Now I'm getting alot of Cron errors. Heres just one of the 42 I got today alone

Database error in vBulletin 3.5.3:
Invalid SQL:
UNLOCK TABLES;
MySQL Error :
Error Number :
Date : Thursday, January 19th 2006 @ 12:22:18 PM
Script : http://www.gamer4um.com/4ums/cron.php?rand=966602
Referrer :
IP Address : 65.54.188.86
Username : Unregistered
Classname : vb_database

I've checked my root account in MySQL and it has full access, So I'm not sure why this is happening. But I've not added anything new to my site other then vBSEO.

try http://www.vbulletin.com/forum/bugs3...iew&bugid=2056

So I only need to remove this code?

$vbulletin->db->close();

Originally Posted by MentaL

try http://www.vbulletin.com/forum/bugs3...iew&bugid=2056

Thanks I removed that code, We'll see if this fixes it... Thanks