Working with Facebook Connect

[eluser]Unknown[/eluser]
Hi Guys.

I have installed the library according to this site: http://www.haughin.com/code/facebook/
and i cannot deal with it.
When i access the controller and click on the login button it says that API is invalid (and believe me it is not)
Also when i access it through the app.facebook... it says that disallowed URI characters.

Does someone have a working example with facebook connect?

Thanks a lot,

Roee A.