Discussione: risposta rapida e modalita' avanzata

come da oggetto..mi da' questo errore

error in vBulletin 3.6.0 Beta 4:

Invalid SQL:

SELECT post.postid, post.title, post.pagetext, post.dateline, post.userid, post.visible AS postvisible,
IF(user.username, user.username, post.username) AS username,
thread.threadid, thread.title AS threadtitle, thread.postuserid, thread.visible AS threadvisible,
forum.forumid, forum.password
FROM adminhelppost AS post
LEFT JOIN adminhelpuser AS user ON (post.userid = user.userid)
INNER JOIN adminhelpthread AS thread ON (post.threadid = thread.threadid)
INNER JOIN adminhelpforum AS forum ON (thread.forumid = forum.forumid)
WHERE post.postid IN ();

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 ')' at line 9
Error Number : 1064
Date : Thursday, July 6th 2006 @ 03:36:03 PM

si puo' aggiustare??e se si come??