[fw-mvc] Validator not working

ello Everyone,

I am trying to get my UniqueEmail validator working but it seems that my validator is never triggered.

This is my form:

  class EventManager_Form_User_Base extends SF_Form_Abstract{
  public function init(){
  
    $this->addElementPrefixPath(
          'EventManager_Validate',
          APPLICATION_PATH . '/modules/eventManager/models/validate',
          'validate'
          );
  
    (...)
      $this->addElement('text','usr_email', array(
          'filters'   => array('StringTrim', 'StringToLower'),
          'valdators' => array(
              array('StringLength',true,array(3,128)),
              array('EmailAddress'),
              array('UniqueEmail', false, array(new EventManager_Model_User())),
          ),
          'required'  =>  true,
          'label'     => 'email',
      )); 
  


(...)
  }
  

}

And here is my validator

  class EventManager_Validate_UniqueEmail extends Zend_Validate_Abstract{
  
    const EMAIL_EXISTS = 'emailExists';
  
    protected $_messageTemplates = array(
          Self::EMAIL_EXISTS => 'Email "%value%" already exists in our system',
      );
  
    public function __constructs(EventManager_Model_User $model){
  
        $this->_model = $model;
  
    }
      public function isValid($value,$context = null){
  
        $this->_setValue($value);
          $currentUser = isset($context['usr_id']) ? $this->_model->getUserById($context['user_id']) : null;
          $user = $this->_model->getUserByEmail($value, $currentUser);
          if(null === $user){
              return true;
          }
          $this->_error(self::EMAIL_EXISTS);
          return false;
      }
  
}
  

When I add the line

  var_dump($value); exit; 
  

in the first line of my isValid() function and then run my form. then the code just runs but seems not to get into my validator.

I am running zf 1.10.1 any idea's / suggestions?

J sanders