What the butons Yes, Maybe, I'm attending are not working

Hello,

I have instaled events+

I have one problem:

buttons No, Maybe, I’m attending not work

http://fishingcafe.pl/events/2013/02/ognisko-integracyjne-uzytkownikow-fishingcafe/

What I am doing wrong?

This is great plugin, and I would like to have fully working

Best regards

Slavomir Kot (Poland)

PS. My name have letter with national glymps in login I have ___