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.