I have set this up on my site www.thejungle.uk.net (Home page, bottom right) Clicking the facebook button asked my permission to accept it. After clicking ok I was returned to my home page but got a message saying Sign up with Facebook is not permitted.

I have set it up so that you cannot register. (I only want existing members to be able to login.)

www.thejungle.uk.net/components/com_comprofiler/plugin/user/plug_cbconnect/endpoint.php?provider=facebook