please help me out..i am unable u use this application..whenever i tried to log in this message appears..
RFacebook environment information
This shows you at a glance the information that RFacebook has populated for you. 
More information at rfacebook.rubyforge.org. Please report RFacebook bugs here. 
 
UsersController			   
fbsession	PROBLEM 	session is invalid, you will not be able to make API calls (possibly due to a bad API key or secret)
fbparams	PROBLEM 	fbparams is not populated since we weren't able to validate the signature (possibly due to a bad API
key or secret)
in_facebook_canvas?	OK 	yes 	   
in_facebook_frame?	OK 	no 	   
facebook_api_key	OK 	XXXXXXXXXXXXXXXXXX1e34 	   
facebook_api_secret	OK 	XXXXXXXXXXXXXXXXXXac0a