Need help with a Zend login script

Hi All,

I’m new to Zend and I’m trying to set up a simple user login script with that framework.
Here’s the LoginController.php :


public function processAction()
    {
        $request = $this->getRequest();

        // Check if we have a POST request
        if (!$request->isPost()) {
            return $this->_helper->redirector('index');
        }

        // Get our form and validate it
        $form = $this->getForm();
        if (!$form->isValid($request->getPost())) {
            // Invalid entries
            $this->view->form = $form;
            return $this->render('index'); // re-render the login form
        }

        // Get our authentication adapter and check credentials
        $adapter = $this->getAuthAdapter($form->getValues());
        $auth    = Zend_Auth::getInstance();
        $result  = $auth->authenticate($adapter);
        if (!$result->isValid()) {
            // Invalid credentials
            $form->setDescription('Invalid credentials provided');
            $this->view->form = $form;
            return $this->render('index'); // re-render the login form
        }

        // We're authenticated! Redirect to the home page
        else {
			$this->_helper->redirector('index', 'index');
		}
    }

and the called getAuthAdapter function from the same file :


protected function getAuthAdapter(array $params)
    {
        $dbAdapter = Zend_Db::factory('Pdo_Mysql', array(
                                                'host'     => 'localhost',
                                                'username' => 'root',
                                                'password' => 'my_password_here',
                                                'dbname'   => 'my_db_name_here'
                                            ));

		$authAdapter = new Zend_Auth_Adapter_DbTable($dbAdapter);

        $authAdapter->setTableName('users')
            ->setIdentityColumn('username')
            ->setCredentialColumn('password')
            ->setCredentialTreatment('MD5(?)');
			
	$adapter = $authAdapter;
        $adapter->setIdentity($params['username']);
        $adapter->setCredential($params['password']);

        $auth = Zend_Auth::getInstance();
        $result = $auth->authenticate($adapter);

        if ($result->isValid()) {
            $user = $adapter->getResultRowObject();
            $auth->getStorage()->write($user);
            return true;
        }
        return false;
    }

The problem is when I try to login with CORRECT data, the browser is displaying a blank page and stops at /login/process
When I refresh the page, after I confirm the browser’s dialog box :


To display this page, Firefox must send information that will repeat any action (such as a search or order confirmation) that was performed earlier.

the script renders the index page and I’m logged in.
If I enter invalid login details, the script stops at /login/process and regardless if I refresh the page, it displays a blank page with no content and empty source code… I believe I made some basic mistake and for someone familiar with Zend framework this will be an easy debug (hopefully)… Thank you in advance for your help!!!