Error en la base de datos

Database error in vBulletin 3.8.5:

Invalid SQL:

        SELECT
                thread.threadid, thread.title, thread.lastpost,  thread.forumid, thread.replycount, thread.lastposter, thread.dateline,  IF(views<=replycount, replycount+1, views) AS views, thread.visible,  user.username, user.userid, user.usergroupid, IF(displaygroupid=0,  user.usergroupid, displaygroupid) AS displaygroupid, thread.iconid AS  threadiconid, iconpath AS threadiconpath

        FROM thread AS thread
                LEFT JOIN  user AS user ON (user.username = thread.lastposter)
                LEFT JOIN icon AS icon ON (icon.iconid = thread.iconid)

                WHERE NOT ISNULL(thread.threadid)
                AND thread.forumid NOT IN (,6,165,164,180)
                AND thread.visible <> 2
        ORDER BY lastpost DESC LIMIT 0, 10;

MySQL Error   : You have an error in your SQL syntax; check the manual  that corresponds to your MySQL server version for the right syntax to  use near '6,165,164,180)
                AND thread.visible <> 2
        ORDER BY lastpost DESC LIMIT 0, 10' at line 9
Error Number  : 1064
Request Date  : Sunday, September 12th 2010 @ 05:36:07 PM
Error Date    : Sunday, September 12th 2010 @ 05:36:08 PM
Script        : [URL]http://www.bitenex.com/[/URL]
Referrer      :
IP Address    : 66.249.71.173
Username      : No Registrado
Classname     : vB_Database
MySQL Version :

AND thread.forumid NOT IN (,6,165,164,180)