Odd MySQL Error

[JJ the Fox]

I'm getting this error when I try to post in one specific thread on my site

Database error in vBulletin 3.7.3:

Invalid SQL:

(SELECT permissions, permissions2, FIND_IN_SET(forumid, '7,6,-1') AS pos, forumid
FROM tealandbmoderator
WHERE userid = 1 AND forumid IN (7,6,-1)
ORDER BY pos ASC
LIMIT 1)
UNION
(SELECT permissions, permissions2, 0, forumid
FROM tealandbmoderator
WHERE userid = 1 AND forumid = -1
);

MySQL Error : MySQL server has gone away
Error Number : 2006
Request Date : Tuesday, December 9th 2008 @ 01:58:00 PM
Error Date : Tuesday, December 9th 2008 @ 01:58:11 PM
Script : http://tealandblack.net/forums/newre...streply&t=5041
Referrer : http://tealandblack.net/forums/major...cussion-4.html
IP Address : ******
Username : JJ
Classname : vB_Database
MySQL Version :

Anyone know what is wrong? What I need to do?

Thanks in advance for any and all help.