SQL-DATABASE ERROR

Database error in WoltLab Burning Board: Invalid SQL: SELECT b.boardid FROM bb1_boards b LEFT JOIN bb1_permissions p ON (p.groupid='5' AND b.boardid=p.boardid) LEFT JOIN bb1_access a ON (a.userid ='0' && a.boardid = b.boardid) WHERE b.password='' AND p.boardpermission=1 && (a.boardpermission =0 || ISNULL(a.boardpermission)
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
mysql error number: 1064
Date: 09.09.2010 @ 05:45
Script: /search.php?action=polls
Referer: