Looked into it, its because you don't have a Facebook username. You can create one at https://www.facebook.com/help/?faq=200712339971750 I'll implement a fix but it will take sometime to get to production.

It looks like you have a username now.

Followed the link you supplied and created a username, voila! it's connected and working. Thank you for replying so quickly with a solution - awesome!

No problem, I already fixed it so when the next version comes out it will be fixed.