Liverails tutorial | Error

Hello all,

I followed the liverails tutorial and made a facebook application (the
social recipe application). Up till the point where we run our
application
using an IFrame, my application works fine, but when we change our
application settings to use FBML and deploy it to a live ip machine, I
get
an error

Received HTTP error code 422

when I send a hit to Log into Facebook

I have rails version 2.0.1. Any help in this regard will be highly
appreciated


Regards

Haris G.