I can confirm that the image create script works for me too, its not giving you any error messages?
Although i haven't fully tested it, i shall do so now.

EDIT: Yep works, make sure that the path to the script is correct, if it is do as Wildhoney suggested and run the script directly and see what it produces.

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