Wysiwyg not showing up

When changing the body format from plain text to full html with wysiwyg the text area doesn't change.

I've applied this changes in rotor.module and it works

//add wysiwyg to $form['body_filter']['body'] array
  '#wysiwyg' => TRUE,
);
//and change
//$form['body_filter']['filter'] = filter_form($node->format); 
  $form['body_filter']['format'] = filter_form($node->format);

In rotor_form function