datebase problem ?

[desperado2]

Invalid SQL:

		SELECT *
		FROM threadrate
		WHERE userid = 1
			AND threadid =;

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 4
Error Number : 1064
Date         : Wednesday, January 9th 2008 @ 10:21:58 PM
Script       : http://sitename/showthread.php?t=9210
Referrer     : http://sitename/search.php?searchid=11174
IP Address   : .................
Username     : username
Classname    : vb_database