Problem with autentication CAKEPHP

Hi i have this issue: When i put my user and pass say's invalidate username and pass.

The code:

class AppController extends Controller {

     public $components = array(

        'Session',

        'Auth' => array(

            'loginRedirect' => array(

                'controller' => 'users',

                'action' => 'index',

                'authenticate' => array('Form')

            ),

            'logoutRedirect' => array(

                'controller' => 'pages',

                'action' => 'display',

                'home'

            )

        )

    );

    public function beforeFilter() {

        $this->Auth->allow('index', 'view');

    }

}

------------------------

class UsersController extends AppController {

 public function beforeFilter() {

        parent::beforeFilter();

        $this->Auth->allow('add');

    }

public function login() {

    if ($this->request->is('post')) {

        if ($this->Auth->login()) {

            return $this->redirect($this->Auth->redirect());

        }

        $this->Session->setFlash(__('Invalid username or password, try again'));

    }

}

public function logout() {

    return $this->redirect($this->Auth->logout());

}

-----------

LOGIN.CTP

<div class="users form">

<?php echo $this->Session->flash('auth'); ?>

<?php echo $this->Form->create('User'); ?>

    <fieldset>

        <legend>

            <?php echo __('Please enter your username and password'); ?>

        </legend>

        <?php echo $this->Form->input('name');

        echo $this->Form->input('password');

    ?>

    

    </fieldset>

<?php echo $this->Form->end(__('Login')); ?>

</div>

---------------------

class User extends AppModel {

public function beforeSave($options = array()) {

    if (isset($this->data[$this->alias]['password'])) {

        $passwordHasher = new SimplePasswordHasher();

        $this->data[$this->alias]['password'] = $passwordHasher->hash(

            $this->data[$this->alias]['password']

        );

    }

    return true;

}

*-*************************

Can you help me?

Thanks

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