Can't enter Private Messages

[ringoflight]

Hi there, I really need a little help. For some unknown reason, an error has started to occur whenever myself or my members want to check their private messages.
The error is as follows:

Database error in vBulletin 3.6.4:

Invalid SQL:

SELECT COUNT(*) AS total, folderid
FROM pm AS pm
LEFT JOIN pmtext AS pmtext USING(pmtextid)
WHERE userid = 1
GROUP BY folderid;

MySQL Error : Unknown column 'folderid' in 'field list'
Error Number : 1054
Date : Sunday, February 4th 2007 @ 07:30:22 PM
Script : http://mysite.com/private.php
Referrer : http://mysite.com/forums.php
IP Address :
Username :
Classname : vb_database

Any help?