CakePHP and Facebook login system COOKIE ERROR

I was reading this guide ( http://bakery.cakephp.org/articles/view/integrating-facebook-connect
) , I get an error about cookie:

Notice (8): Undefined property: UsersController::$Cookie [CORE/cake/
libs/controller/app_controller.php, line 113]
Fatal error: Call to a member function read() on a non-object in /cake/
libs/controller/app_controller.php on line 113

This is the error details:
AppController::get_facebook_cookie() - CORE/cake/libs/controller/
app_controller.php, line 113
AppController::__construct() - CORE/cake/libs/controller/
app_controller.php, line 49
Dispatcher::__getController() - CORE/cake/dispatcher.php, line 385
Dispatcher::dispatch() - CORE/cake/dispatcher.php, line 116
[main] - APP/webroot/index.php, line 83

line 113 in app_controller is:
$tmp = $this->Cookie->read('fbs_'.$app_id.'');

line 49 is:
$this->FACEBOOK_COOKIE = $this->get_facebook_cookie($this-
>FACEBOOK_APP_ID, $this->FACEBOOK_SECRET);

Where I Wrong? I have added 'Cookie' in components array but nothing
change.

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