[Plugin: Rating-Widget] Nothing appears

I have installed rating-widget and configured the settings in Dashboard, (to show on posts and front page) but it doesn’t appear anywhere.
I tried reinstalling it but the same thing happens.
Do I need to put some code into any of the php files??
The site is at http://www.e-englishteacher.com/blog/

http://ww.wp.xz.cn/extend/plugins/rating-widget/