Ajax checker shows homepage?

Hi there,

Apologies if this is a noob question..

Just installed CB 1.8.1, on a Joomla 2.5.6 site, all working fine apart from one thing.

Adding a user in the backend, the ajax email checker works fine, in the front end it just shows a copy of the homepage? The ajax username Checker also does the same thing.

Would love to be able to use it, and i'm sure it is a setting somewhere, i just dont know where.

Any help appreciated, page can be seen at www.etask.it/en/component/comprofiler/registers

Cheers