Help on logout on CI 2.0.2

[eluser]spaquet[/eluser]
Here is the logout function:

Code:

public function logout() {
        $this->session->sess_destroy();
        redirect('/');
    }

First: I'm getting the following error

Message: Undefined property: Logout::$session

which is pretty strange since session is loaded and running properly on the login page and main pages of the site...

Second: when I'm just doing a session data cleanup the following way:

Code:

$this->_remove_session($this->session->all_userdata());

redirection is not happening. I'm getting a white page with no code in while I want it to be the home page (in my cas the login form)..
I tried

redirect('login/index')

but this did not change anything...