Bugfix Facebook login in CakePHP application

Hi! I have a web application build in CakePHP. I have a complete registration system set up. And now Im trying to implement Facebook login. I have implemented Facebook SDK, and sat up everything (Facebook app ID, secret). But some reason for some reason I can't pull user information from Facebook - Im getting "Notice (8): Undefined index: email"... If I hard code a email into the UsersController I can make it work, but I can't pull the information from Facebook :-( If you have done something similar before Im sure it shouldt be a big deal. Thank you /Jens