Facebook Connect - Logging out

I using facebook connect in my application. i am not able to logout of the account.

logout

    $this->Session->destroy();
    $this->redirect($this->Auth->logout());

now i logout of Facebook.com and in my application i click Facebook Connect. it still logs me in with out asking me to login开发者_如何学编程 to facebook.com.

Wierd.

I was setting the Cookie => true so FB Connect could recognize me even if i was logged out.