$this->form_validation->run() results in blank page?

Code:
public function follow_up_report()

 {

  $data['title'] = 'Follow-Up Report';

  $data['status'] = 'no_success';



  if ($this->uri->segment(3) == 'save')

  {

   $this->form_validation->set_rules('date', 'date', 'valid_date');

   $this->form_validation->set_message('valid_date', 'You must enter a valid date!');



   if ($this->form_validation->run())

   {

    $data['status'] = 'success';

   }

  }



  $data['page_content'] = $this->parser->parse('outreach/follow_up_report', $data, TRUE);

  $this->parser->parse('outreach/main_view', $data);

 }