Database error!

Hello,

I get a database error when i installed ibProArcade.

Heres the error

Database error in vBulletin 3.6.7:

Invalid SQL:

SELECT t.champion, u.userid FROM tournaments AS t
LEFT JOIN user AS u ON (t.champion = u.username)
WHERE champion<>'';

MySQL Error : Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (latin1_general_ci,IMPLICIT) for operation '='
Error Number : 1267
Date : Thursday, June 28th 2007 @ 01:47:28 PM
Script : http://www.skylightforum.com/showthread.php?p=1271
Referrer : http://www.skylightforum.com/
IP Address : 87.79.236.42
Username : Flisker
Classname : vb_database


How can this be sorted?

Thanks
Snoop-20