Error 1054 when open New Thread

[Rolll]

Hi,
when I (administrator id:1) open a new thread (only with text) vB gives me this error:

Why?

Database error in vBulletin 4.2.0:

Invalid SQL:

SELECT dateline, filename, attachmentid
FROM vb_attachment
WHERE postid = 78076
ORDER BY attachmentid;

MySQL Error : Unknown column 'postid' in 'where clause'
Error Number : 1054
Request Date : Friday, September 14th 2012 @ 10:28:17 AM
Error Date : Friday, September 14th 2012 @ 10:28:17 AM
Script : http://www.******.it/forum/newthread...stthread&f=146
Referrer : http://www.******.it/forum/newthread...ewthread&f=146
IP Address :
Username : Proid
Classname : vB_Database
MySQL Version : 5.1.63-0+squeeze1