[SOLVED] Conflict between atahualpa and contact form 7 or really simple capcha

Hello,

I installed "Really simple Captcha" and configured my mail form accordingly. The problem now is that when I click submit, the little arrows start to spin, but no green confirmation message shows up. The message itself does get delivered.

In FAQ of contact form 7 Written:

"The spinning arrow icon shows up once I submit a form, but then nothing happens.
This is most probably due to a conflict between plugins/theme."

What could be the problem and how to fix it?

My website: http://www.niryefet.com/?page_id=76

Thank you.