Проблема с валидацией формы symfony 1.4, условие

if ($ this->signInForm->isValid())

всегда FALSE.

public function executeSignIn(sfWebRequest $  request) {     $  this->signInForm = new SignInForm();     if ($  request->isMethod('POST'))     {         print_r($  request->getParameter('login'));         $  this->signInForm->bind($  request->getParameter('login'));         if ($  this->signInForm->isValid())         {             echo "valid form";         }     }     //$  this->forward('default', 'module'); }      class SignInForm extends sfForm {     public function configure()     {         $  this->widgetSchema['username'] = new sfWidgetFormInput();         $  this->widgetSchema['password'] = new sfWidgetFormInputPassword();         $  this->validatorSchema['username'] = new sfValidatorString(array('required' => TRUE),array('required' => 'You must enter your username') );         $  this->validatorSchema['username'] = new sfValidatorString(array('required' => TRUE),array('required' => 'You must enter your password') );          $  this->widgetSchema->setNameFormat('login[%s]');     } }    <form action="<?=url_for('user/signIn')?>" method="POST">     <?= $  signInForm['username']->renderLabel() ?>     <?= $  signInForm['username']?>     <?= $  signInForm['password']->renderLabel() ?>     <?= $  signInForm['password']?>     <input type="submit" name="submit" value="submit" /> </form>