I have been facing a technical problem in Joomla 2.5. I've two captchas in Contact form and registration page.
Because of two captchas both are conflicting and showing an error "the words you typed did not match the ones displayed" at registration page.

But my contact form is working perfectly.

Where I understood, two captchas at one website do not work.

I need captcha at registration page to stop spamming. I enabled in K2 components and given public and private keys.

When I change the keys at plugin manager I am getting an error "The captcha code invalid", if don't change the keys the above error. Ultimately, I am not able to use my registration page.

Could any one help in this.

Looking forward to a reply.

Please do not double post. I deleted your other post.
Since you are using K2's captcha you need to select None in the User Manager's captcha settings.

Thanks Krikor for the reply. I did it and now I am not having the two captha problem. But still I am facing the same error at new user registration.

Could you provide any solution to this. Even I am very sure the changes in "recaptcha.php".

Looking forward to a solution.

Try deactivating the captcha plugin.