User registration

Hello, when user can register (use link up-right), open popup and when send always say a message that this user is not correct. Then open page resitration of joomla (not popup) and then work ok.
Can you try it?

My site: botiga.lacalendula.net

thanks

Hello, when user can register .....thanks

Look into your captcha settings.... i tested 4 times and the same comes back... passwort incorrect, name not avaliable and a point more.....

Hello, when user can register .....thanks

Look into your captcha settings.... i tested 4 times and the same comes back... passwort incorrect, name not avaliable and a point more.....

Captcha plugin only have key public and private key.

Problem is only in popup regitration, when popup says errro, show a form without popup, and then is no problem to registration. It seems that problem is in popup.

Can you help me?