Reward Point Mod beta now available

Hi. I have downloaded your reward system for zencart but after installing i get this error message "Warning: call_user_func(UseRewardPointStateFunction): First argument is expected to be a valid callback in /home/0604357d/public_html/zencart/admin/includes/functions/general.php on line 1544" Do you what does this error message means? anyway i am currently using phpadmin of 2.6.4. is it because of this problem?

On the subject of uninstall. I neede to remove the Reqwars mod so I dropped the three aforementioned tables and went through the files on my server removing "Rewards" files and now on the individual products listings the description os gone along with the right side boxes and the buy cart buttons. Not sure what I did wrong.

Anybody got a clue? I can restore from backup but it is a week old and it would be nice to have a clue what files to restore instead of the whole thing!

Can I ask a couple of questions..I wanted to use the module in the way that a customer gets 1 point for every £25 they spend..and then when they reach so much they can redeem..Can this be done??