CakePHP Session component error
===

In my CakePHP application, when I use another controller's class, I get Session read function error.

`example.com/app/getList` works well  
`example.com/seconds/parseList` works well  
But `example.com/first/index` gives this error:

    Fatal error: Call to a member function read() on a non-object in
    /example.com/app/Controller/AppController.php on line 468

Line 468 is this: `$list=$this->Session->read('myList');`

How can I fix this ? 

    class FirstController extends AppController {
    	public function index () {
    		$Seconds = new SecondsController();
    		$Seconds->parseList();
    	}
    }
    
    class SecondsController extends AppController {
        public $helpers = array('Html', 'Session');
    
    	public function parseList () {
    		$output = $this->getList();
    		return output;
    	}
    }
    
    class AppController extends Controller {
        public $uses = array('App', 'Mydata');
        var $components    = array('Session');
        public $helpers = array('Session','Html','Cache');
    	
    	public function getList () {
    	    $list=$this->Session->read('myList');
    		return $list;
    	}
    }

