database has encountered a problem external.php?

[redstaing.net]

xxx/vb/external.php

dont work

and i get


Database error in vBulletin 3.6.0:
Invalid SQL:
SELECT COUNT(threadid) AS total FROM thread WHERE postuserid=;
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 : Wednesday, August 16th 2006 @ 01:42:54 PM
Script : http://www.bbbb/external.php
Referrer : http://bbbb
Classname : vB_Database

[Jake Bunce]

Syntax errors like this are usually the result of custom code (plugin or file hack). Try disabling your plugins and removing any file hacks.