Error in Product order

[cwbullet]

I just installed review post and in the admin panel when I hit product order, I get this error:

MySQL error reported!

Script: adm-order

Query: SELECT id,user,userid,cat,title,bigimage,disporder FROM rp_products WHERE cat= AND disporder < 99999 ORDER BY disporder,lastpost DESC

Result: 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 'AND disporder < 99999 ORDER BY disporder,lastpost DESC' at line

Database handle: Resource id #6

[Michael P]

In adm-order.php at line 48 find and add the code in bold:

$catdefault = ""; $nocat=0;
if ( $cat == "notcat" ) { $cat=500; $notcat=1; }
if ( empty($cat) ) $cat = 500;