comments not working,

well after i asked hostnet to install the latest version of vshare, it started workign fine, however i never noticed that the comments never worked. When you type in a comment, and press "Post Comment" nothing happens,

yes i am logged in

and also

the buttons, add to favorites, feature this and inappropriate dosen't work, any idea on what is happening?

Login to cpanel and check the error log .There you can findout the exact problem of comments ,add to favorites etc...
If you can't PM your login details,i can check and let you why you are having problem with comments