EBR does not worh

Hi, I installed the component without any error. I set in "options" can inseire messages for all but when I post a message does not display anything and get redirected to the homepage of the site.
I am using joomla 2.5 with a template joomlafap (accessible). I also tried with a normal template but nothing. The posted messages do not appear. The site is proftatafad.besaba.com - top menu - "guestbook". What's wrong? Thank you.