Database error with vb 3.0.7

[YUSIF]

Hi , I made forum that to allow Unregistered / Not Logged In to write any problems thay faced while they try to log in or register . and when they wrote
thier threaded the thread title show in the forum list but when I click on the tilte to read i got Database error


error msg.
=======================
Database error in vBulletin 3.0.7:
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
mysql error number: 1064
=======================



but when any member already logged on wrote any thread in the same forum it's show fine no any error . and all the Forum Permission fine I checked them well

than I replaced " newthread.php & showthread.php " with new files but the problem still .

my vb is 3.0.7 , how can I fix this problem ?


Notice : it was work fine with out any error with users not registerd when i was useing vb 3.0.3

Thanks