[Plugin: WP Customer Reviews] Average rating and other issues

Hey,

I would like to know how to make the average rating for the pages? It would be great to know it. Also, I am not sure is it my free hosting (http://www.host1free.com) fault or script fault, but when I approve the review it gives me some error, which after the refresh disappears. Any suggestions on those two?

http://wordpress.org/extend/plugins/wp-customer-reviews/