Session->destroy doesn't work when using Flash-sessions.

[eluser]Slowcheetah[/eluser]
Why ALL the sessions stay alive when i execute the following code?

ALL SESSIONS STAY ALIVE??

Code:

function signout() {
        // destroy all sessions (username and password)
        $this->session->sess_destroy();
        // set user message
        $this->session->set_flashdata('msg', 'Succesfully signed out.');
        // Redirect to signin page
        redirect('');
    }

If i don't set the flash message the code works perfect, and all sessions get destroyed. But cannot report to user

ALL SESSIONS DESTROY SUCCESFULLY

Code:

function signout() {
        // destroy all sessions (username and password)
        $this->session->sess_destroy();
        // Redirect to signin page
        redirect('');
    }