[SF2][Symfony][Symfony2]Attempted to call method "redirectToRoute" Opcje

[kosmos]

Witam
Mam problem z przekierowaniem do innej strony:

[PHP] pobierz, plaintext 
namespace Acme\PageBundle\Controller;
 
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Acme\PageBundle\Entity\Message;
use Symfony\Component\HttpFoundation\Request;
class DefaultController extends Controller
{
public function contactAction(Request $request)
    {
        $message = new Message();
        $message->setName('');
        $message->setSurname('');
 
        $form = $this->createFormBuilder($message)
            ->add('name','text')
            ->add('Wyślij zapytanie','submit')
        ->getForm();
 
        $form->handleRequest($request);
 
            if ($form->isValid()) {
                // perform some action...
            return $this->redirectToRoute('acme_task_success');
            }
 
        return $this->render('AcmePageBundle:Default:contact.html.php', array(
            'form' => $form->createView(),
            ));
    }
}
[PHP] pobierz, plaintext 

Po wywołaniu submita pojawia się problem z wywołaniem funkcji redirectToRoute nie wiem dlaczego

Attempted to call method "redirectToRoute" on class "Acme\PageBundle\Controller\DefaultController" in C:\xampp\htdocs\symfony\src\Acme\PageBundle\Controller\DefaultController.php line 84.

EMERGENCY - Call to undefined method Acme\PageBundle\Controller\DefaultController::redirectToRoute()
CRITICAL - Uncaught PHP Exception Symfony\Component\Debug\Exception\UndefinedMethodException: "Attempted to call method "redirectToRoute" on class "Acme\PageBundle\Controller\DefaultController" in C:\xampp\htdocs\symfony\src\Acme\PageBundle\Controller\DefaultController.php line 84." at C:\xampp\htdocs\symfony\src\Acme\PageBundle\Controller\DefaultController.php line 84

Pomożecie?