Komento doesn't work

Hello Stackideas, sorry for my English, im from Germany.

I have same problem with all Comments Extensions, but my favourite is Komento.

I installed Komento but its not possible to write a Comment... "Send Comment" looks disabled...

Can you Help me?
I have Joomla 2.5.11 and a Gantry Template, i have also a extra area for K2 Blog... in K2 its possible to write comments, but the "Send Comments" looks disabled too and the spinning mirrors are spinning and spinning ..... But in the Backend i can publish comments...

But Komento doesnt work.

Thank you