You can try posting this on the help desk. Could be your browser but I've tried all the steps myself and it just didn't work for me. So best of luck to ya.
Yeah man it's more in depth than that. I tried on every browser on my old laptop and chrome on ze chromebook. Faceup tried to explain it to me but way too much technical crap for my dumb self. Viper also explained problem solving methods on the help desk. Trust me BTG your not the first and you won't be the last experiencing issues and you won't be the last. But if anyone can help you you'll find them through the help desk.
there is a open thread regarding facebook connect in the help desk. I believe it was KoG Faceup XD that said its not working due to Facebooks new security policies, but its a known(open) issue.