Form Post On Footer

Hi all!

I've the following issue, when I want to retrieve the values of a POST in the controller the values are send like this (var_dump):

array(1) {
  ["Email"]=>
  string(14) "jdoe@gmail.com"
}

This is the form:

<?php 
      $form=$this->beginWidget('CActiveForm',array(
        	'id'=>'suscribete-form',
          	'action'=>array('site/suscribete'),
          	'enableAjaxValidation'=>true,
          	'enableClientValidation'=>false,
          	'clientOptions'=>array(
          		'validateOnSubmit'=>true,
          		'validateOnChange'=>false
          	),
      ));
?>
<div class="input-append">
<?php echo CHtml::textField('Email');?>
<?php echo CHtml::ajaxSubmitButton('Enviar!',
             $this->createUrl('site/suscribete'),
             		array(
             		      'type'=>'post',
             		      'success'=>'js:function(data){
             					if(data!=""){             										         
                                                    $("#resultadosAjax").html(data);
            			                }
             				  }'
             		)
             );
?>
</div>
<?php
     $this->endWidget();
?>

Any idea why this is happening?