close modalframe after submitting webform

I have a webform node inside a modalframe, and i can't manage to have it closed when submitting the it, it just redirects inside the frame.

Here's my set up:
1) I created a webform node

2) in a module, I created a menuitem:

$items['famosos/proponer'] = array(
    'title' => 'Ranking Famosos',
    'page callback' => 'famosos_ranking_proponer_famoso',  
    'access callback' => TRUE,
    'type' => MENU_CALLBACK,  
  );

3) created the function famosos_ranking_proponer_famoso (here i tried two things, loading and embeding the node itself, or directly the form):

function famosos_ranking_proponer_famoso(){	
  modalframe_child_js(); 
  $node = node_load(11446);	 
  return node_view($node, $teaser = FALSE, $page = TRUE, $links = FALSE);;
}

OR

function famosos_ranking_proponer_famoso(){	
  modalframe_child_js(); 
  $node = node_load(11446);	
  $submission = array();
  $enabled = TRUE;
  $preview = FALSE;
  return drupal_get_form('webform_client_form_11446', $node, $submission, $enabled, $preview);
}

4) used the hook_form_alter to add a submit function to the form:

function famosos_ranking_form_alter(&$form, &$form_state, $form_id) {
  if ($form_id == 'webform_client_form_11446') {
  	$form['#submit'][] = 'famosos_ranking_proponer_famoso_submit';
  }
}

5) created the submit function:

function famosos_ranking_proponer_famoso_submit($form, &$form_state) { 
    // Tell the parent window to close the modal frame dialog.
    modalframe_close_dialog(array(
      'message' => t('changos!'),
    ));    
}

6)here i define the link that'll open the modalframe (I created a block with a hook_block and this function renders its content):

function famosos_ranking_propone_famoso(){
modalframe_parent_js();	
  drupal_add_js(drupal_get_path('module', 'famosos_ranking') .'/famosos_ranking.js');	
 return l(t('Proponé un famoso'), 'famosos/proponer', array('attributes'=>array('class'=>'popup')));	
}

7) and finally... here's the content of famosos_ranking.js:

(function ($) {
Drupal.behaviors.famosos_ranking = function() {		
	$('a.popup:not(.modalframe-processed)').addClass('modalframe-processed').click(function() {
		
	   var element = this;  
	   	   
	   // Build modal frame options.
	    var modalOptions = {
	      url: $(element).attr('href'),
	      autoFit: false,
	      width: 500,
	      height: 500
	    };	    
	
	    // Open the modal frame dialog.
	    Drupal.modalFrame.open(modalOptions);	    

	    
	    // Prevent default action of the link click event.
		    return false;    
	});
}

})(jQuery);

Please some advice will be appretiated, I tried this set up with a node edit form and works (it's basically the same as the example form modal_frame_example module) but for some reason it doesn't work with this webform.

regards