Facebooker talk - Mar 2008 - undefined method using ensure_authenticated

I''ve stepped through the basics of setting up facebooker, but I
consistently see this message:

"undefined local variable or method
`ensure_authenticated_to_facebook''
for FacebookController:Class"

My controller is defined:

<<
class FacebookController < ApplicationController

 ensure_authenticated_to_facebook

 def index
 @facebook_user = session[:facebook_session].user
 end

end
>>
I have this route:
<<
  map.root :controller => "facebook"
>>
I am using facebooker as a plugin inside my Rails app.

Any help would be greatly appreciated as I am really stumped on this one.

Toby Hede