Problems with cookies / MAMP / CodeIgniter

I am having trouble reading cookies on localhost using MAMP and Codeigniter.

I am trying to display acess authentication cookie in admin area. I can set a cookie (I see this in my browser - Chrome), but I cannot read it after that to provide acess. I have already tried many configurations, but nobody is working. I really need help with this.

These are the main parts of my code:

Here I set the cookie

$cookie = array(
    'name'   => 'login',
    'value'  => 'true',
    'expire' => '0',
    'secure' => TRUE
);
set_cookie($cookie);

Here I redirect the user to the login page if there is no cookie and control panel if the cookie is set

function login_redirect() {
    $this->load->helper('cookie');
    if (uri_string() == 'admin/controlpanel') {
        if ($this->input->cookie('login')) {
        } else {
            redirect('admin/');
        }
    }
    if (uri_string() == 'admin') {
        if ($this->input->cookie('login')) {
            redirect('admin/controlpanel');
        }
    }
}

OBS: all this code is in admin_model

Any tips?

Thanks and sorry for my english. I hope I get it.