sfwidgetformpropelchoice problem

[helloise]

i have the following code:

abstract class BaseLpmServiceForm extends BaseFormPropel
{
  public function setup()
  {
    $this->setWidgets(array(
      'id'                   => new sfWidgetFormInputHidden(),
      'name'                 => new sfWidgetFormInputText(),
      'wap_home'             => new sfWidgetFormInputText(),
      'call_center_number'   => new sfWidgetFormInputText(),
      'catcher_id'           => new sfWidgetFormPropelChoice(array('model' => 'LpmCatcher', 'add_empty' => false)),
      'price_description'    => new sfWidgetFormInputText(),
      'logo'                 => new sfWidgetFormInputText(),
      'invalid_msisdn_text'  => new sfWidgetFormInputText(),
      'terms_and_conditions' => new sfWidgetFormInputText(),
      'service_code'         => new sfWidgetFormInputText(),
    ));

then i have this code in a form:
<tr>
        <th><?php echo $form['catcher_id']->renderLabel() ?></th>
        <td>
          <?php echo $form['catcher_id']->renderError() ?>
          <?php echo $form['catcher_id']?>
          <?php $catcher_id=0;


          $catcher_id = $form->getObject()->getCatcherId();
          $catcher_name = LpmCatcherPeer::retrieveByPK($form['catcher_id']->getValue('name'));
            echo $catcher_name;            
          if ($catcher_name = "zed-catcher")
          {
              echo $form['service_code']->renderLabel();
              echo $form['service_code']->renderError();
              echo $form['service_code'];

          }

      ?>
    </td> 
  </tr>

how can i get the selected value in the dropdown???
everytime i select a different name, the variable $catcher_name; stays the same..it does not change with every selection

please help
thnks

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