rofl, i must admit i only scan read it.
Sigh its been a long day.

anyway the real error must be something to do with 'gid', is 'click' a property or a method? try knocking the '()' off the end. where is 'gid' defined?

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mysql> SELECT * FROM `users` WHERE `users`.`clue` > 0;
Empty set (0.00 sec)