Database error in vBulletin 3.7.2:

Invalid SQL:

(SELECT permissions, permissions2, FIND_IN_SET(forumid, '54,40,-1') AS pos, forumid
FROM moderator
WHERE userid = 1 AND forumid IN (54,40,-1)
ORDER BY pos ASC
LIMIT 1)
UNION
(SELECT permissions, permissions2, 0, forumid
FROM moderator
WHERE userid = 1 AND forumid = -1
);

MySQL Error : MySQL server has gone away
Error Number : 2006
Request Date : Saturday, August 9th 2008 @ 09:44:00 PM
Error Date : Saturday, August 9th 2008 @ 09:44:54 PM
Script : http://www.siteadresi.com/forum/new...tthread&f=54
Referrer : http://www.siteadresi.com/forum/new...wthread&f=54
IP Address : ip adresi yazıyor
Username : nickim yazıyor
Classname : vB_Database
MySQL Version :

bu sorguyu çalıştırmak işe yararmı ?? peki nasıl çalıştırılır :s

ALTER TABLE `moderator` ADD `permissions2` int(10) unsigned NOT NULL default '0';

yardımlarınız için teşekkürler