Why am I getting this database error

[hackindave]

I get this message when I try to send a pm..


Database error in vBulletin 3.6.4:

Invalid SQL:
INSERT INTO hackinda_forumspm (pmtextid, userid) VALUES (6, );

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 1
Error Number : 1064
Date : Monday, January 15th 2007 @ 06:40:40 PM
Script : http://www.hackindave.info/forums/pr...insertpm&pmid=
Referrer : http://www.hackindave.info/forums/pr...?do=newpm&u=17
IP Address : xxx.xxx.xx.xxx
Username : hackindave
Classname : vB_Database_MySQLi

Everything else on the site works fine...forums, shoutbox, arcade
This is a fresh install. I even disabled the hook system but still get the error

Server Type Linux
Web Server Apache v1.3.37 (cgi)
PHP 5.2.0
PHP Max Post Size 8.00 MB
PHP Maximum Upload Size 2.00 MB
PHP Memory Limit 32.00 MB
MySQL Version 4.1.21-standard
MySQL Packet Size 1.00 MB