redirect loop when trying to connect with the Facebook button

Sandeep,
I just registered on your site. First off, you have Address #2 marked as a required field, which is confusing as not all addresses have a 2nd part, just so you know.

As for the redirect issue, I didn't see that. However, after registering I went to a blank white page. That usually means there is a PHP error on the page. Can you go to Joomla's Global Configuration and set Error Reporting to maximum? Then, try to register, or login, and see if you get a white error page with a message. That may help narrow down where the problem is coming from. If not, please try disabling any JFBConnect Profile plugins you have enabled and see if that helps. If so, only re-enable the plugins for extensions you have installed.

Let us know how that goes,
Alex