Discuz! Database Error

(1064) 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 '“3000' at line 1
select count(*) as num from forum_thread where fid in(496) and displayorder>=0 and heats>=“3000

PHP Debug

No.FileLineCode
1plugin.php47include(%s)
2source/plugin/waterfall/waterfall.inc.php21waterFallMain->getMulPage(%d, %d, %d, %d, %d, %d)
3source/plugin/waterfall/main.class.php105discuz_database::fetch_first(%s)
4source/class/discuz/discuz_database.php91discuz_database::query(%s, Array, false, false)
5source/class/discuz/discuz_database.php136db_driver_mysql->query(%s, false, false)
6source/class/db/db_driver_mysql.php153db_driver_mysql->halt(%s, %d, %s)
7source/class/db/db_driver_mysql.php224break()
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