draggabletable theming form

I've a problem when trying to theme my draggable table views ; for example if I change de save button to anything else the rest of the view dissapears !

function garland_theme() {
return array(
'draggableviews_view_draggabletable_form' => array(
'arguments' => array('form' => NULL),
),
);
}

function garland_draggableviews_view_draggabletable_form($form) {
$form['submit']['#value']=t('Go');
$output .= drupal_render($form);
return $output;
}

Thanks for your help.