Facebooker talk - Sep 2009 - Connect to a Facebooker app from iPhone

I''m trying to connect my iPhone application to a Facebooker  
application i developed.

The problem is that trought facebook connect for iPhone i can connect  
to Facebook with correct signature, but it fails with facebooker.

I want to know if there is a list of compulsory parameters to pass to  
facebooker to get the session autenthicated.

I think that i have to create a fb_sig hash with the parameters  
ordered by name and without the fb_sig_ prefix, so it''s different from
connecting to facebook (the params don''t have the fb_sig).
But actually i cannot get it working.

I get
- InvalidAuthenticityToken
Parameters: {"v"=>"1.0",
"ss"=>"1", "session_key"=>"SESSION_KEY-
USER_ID", "method"=>"facebook.fql.query",
"api_key"=>"API_KEY",
"fb_sig"=>"f64155fcd1927710bc788120638e7265",
"call_id"=>"1254257953",
"query"=>"select name from user where uid == USER_ID"}

- Redirected to
http://www.facebook.com/login.php?api_key=API_KEY&v=1.0&next=%2Fdevices%2Fuser

With Parameters: {"v"=>"1.0",
"ss"=>"1", "session_key"=>"SESSION_KEY-
USER_ID", "method"=>"facebook.fql.query",
"api_key"=>"API_KEY",
"fb_sig"=>"33bce9f3e5dd47d877dae7f31d556bec",
"call_id"=>"1254258185",
"query"=>"select name from user where uid == USER_ID"}

- Swapping facebooker config: ''API_KEY''


- Swapping facebooker config: ''''


Do you have any idea?

Should i try another method of authentication?

Thanks,
Matteo