[Plugin: WP-PostRatings] Remove correctly all tested votes

Hello,

I install your fantastic plugin on my website.
In order to see the result, i’ve done some votes. Problem is I can’t remove them correctly. I’ve remove them into my phpmyadmin database but I have can’t vote anymore on each tested articles…

More information here :
http://awesomescreenshot.com/0a78mwhe4

Thank you guyz

http://ww.wp.xz.cn/extend/plugins/wp-postratings/