reCaptcha doesn't work with k2 comments

I used before news template with joomla 2.5 an K2
The recaptcha worked flawlessly.
Now, on my new site with Joomla 3.3 and publisher template and K2,
I can see the recaptcha, but each time you enter the error message it would be wrong.

I enable the recapcha plugin, on the config. site I set recatcha on default, and at the k2 site, I have it set on "yes" an have entered the code.

What is wrong? Over the recaptcha you can read "Enter the two words you see below", but you can see only a number.

You can find my site here:
http://www.lauenburger-online-zeitung.de/

Thanks for your answer!

Hi,
it might be broken.
GK Publisher is very old template.
Please do this test:
Rename this file: \templates\gk_publisher\html\com_k2\templates\default\item_comments_form.php
and test again.

Please make sure that you are using the lasted version of K2 component also

After I have rename the file, I can see one word, but the same probleme, each time you enter the error message it would be wrong.

I try it agai, and now, it's works. Thanks for your help Oscar.

Happy to heard that.
In upcoming Joomla 3.4 there will be new captcha system, more: http://goo.gl/i1fG9y
I tested it on beta1