Invalid SQL Error on upgrade

[hamid]

I wanted to upgrade my forum but get this error on step 5


Database error in vBulletin 3.7.2:

Invalid SQL:

SELECT prefix.*, prefixpermission.usergroupid AS restriction
FROM vb_prefix AS prefix
LEFT JOIN vb_prefixpermission AS prefixpermission ON (prefix.prefixid = prefixpermission.prefixid)
ORDER BY prefix.displayorder;

MySQL Error : Illegal mix of collations (latin1_general_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '='
Error Number : 1267
Request Date : Monday, June 29th 2009 @ 01:41:43 AM
Error Date : Monday, June 29th 2009 @ 01:41:43 AM
Script : http://epaytalk.com/install/upgrade_380a2.php?step=5
Referrer : http://epaytalk.com/install/upgrade_380a2.php?step=5
IP Address : 94.182.149.40
Username :
Classname : vB_Database
MySQL Version : 5.0.77-community

[Marco van Herwaarden]

Please open a support ticket regarding this issue.