Add comment form with JsHelper on cakephp 2.1
===

I have some trouble trying to create a comment submit form with JsHelper on cakephp 2.1. I want to make a comment system just like what you've on facebook. Here is my code:

My AppController

    class AppController extends Controller {
	public $helpers = array('Html', 'Form', 'Js' => array('jquery'));
	public $components = array('RequestHandler');
    }


My CommentsController

    class CommentsController extends AppController {
	public function index() {
		debug($this->RequestHandler);
		$this->set('comments', $this->Comment->find('all'));
		if (!empty($this->request->data)) {
			if ($this->Comment->save($this->request->data)) {
				if ($this->RequestHandler->isAjax()) {
					// Handle Ajax
					$this->render('success', 'ajax');
				}else {
					//$this->Session->setFlash('Comment added');
					$this->redirect(array('action' => 'index'));
				}
			}
		}
	}

My Comment Model

    class Comment extends AppModel {
	public $name = 'Comment';

	public $validate = array(
		'name' => array(
			'rule' => 'NotEmpty',
			'message' => 'Enter your name.'
			),
		'email' => array(
			'rule' => 'email',
			'message' => 'Please supply a valid email address.'
			),
		'content' => array(
			'rule' => 'NotEmpty',
			'message' => 'This field cannot be left blank.'
			)
		);
    }

My index view

    <table>
	<tr>
		<th>Id</th>
		<th>Name</th>
		<th>Email</th>
		<th>Content</th>
	</tr>
	<?php foreach ($comments as $k => $v): ?>
	<tr>
		<td><?php echo $v['Comment']['id']; ?></td>
		<td><?php echo $v['Comment']['name']; ?></td>
		<td><?php echo $v['Comment']['email']; ?></td>
		<td><?php echo $v['Comment']['content']; ?></td>
	</tr>
	<?php endforeach; ?>
    </table>

    <div class="page-header">
      <h1>Add a comment</h1>
    </div>

    <div id="success"></div>
    <div>

    <?php $data = $this->Js->get('#CommentIndexForm')->serializeForm(array('isForm' => true, 'inline' => true));
    $this->Js->get('#CommentIndexForm')->event(
          'submit',
          $this->Js->request(
            array('action' => 'save'),
            array(
                    'update' => '#success',
                    'data' => $data,
                    'async' => true,    
                    'dataExpression'=>true,
                    'method' => 'POST'
                )
            )
        );
     ?>

     <?php 
	 echo $this->Form->create('Comment', array('action' => 'index', 'default'=>false));
	 echo $this->Form->input('name', array('id' => 'name'));
	 echo $this->Form->input('email', array('id' => 'email'));
	 echo $this->Form->input('content', array('id' => 'content'));
	 echo $this->Form->end(__('Submit'));
	 echo $this->Js->writeBuffer();

     ?>
     </div>
      <div id="sending" style='display:none;background-color:lightgreen;'>
	  Sending ...
      </div>

Somebody have an idea ?