inline_radio not working

$vars['sections'] = array(
   array(
    array(
     'title' =>'_report_stats',
     'desc' => 'PHP & EE versions will be anonymously reported to help improve the product.',
     'fields' => array(
      'report_stats' => array(
       'type' => 'inline_radio',
       'value' => '0',
       'choices' => array(
        '1' => 'Yes',
        '0' => 'No'
       )
      )
     )
    ),
              
   )
  );

  // Final view variables we need to render the form
  $vars += array(
   'base_url' => ee('CP/URL', 'cp/addons/settings/form'), //<-- load a template with this content: <?php $this->embed('ee:_shared/form')?> and some other html
   'cp_page_title' => lang('general_settings'),
   'save_btn_text' => 'btn_save_settings',
   'save_btn_text_working' => 'btn_saving',
   'alerts_name' => GMAPS_DATA_MAP.'_settings'
  );

  return $this->output('form', $vars, 'settings');