Avia Layout in LearnDash

Hello,

how can I enable the Avia Layout in LearnDash courses, lections,…?

I tried this, edit the “themes -> enfold -> functions.php” and paste the following code:

    add_filter('avf_builder_boxes', 'avia_register_meta_boxes', 10, 1); //Add meta boxes to custom post types
    function avia_register_meta_boxes($boxes)
    {
        if(!empty($boxes))
        {
            foreach($boxes as $key => $box)
            {
                    $boxes[$key]['page'][] = 'sfwd-courses';
$boxes[$key]['page'][] = 'sfwd-lessons';
$boxes[$key]['page'][] = 'sfwd-topics';
$boxes[$key]['page'][] = 'sfwd-quiz';
            }
        }
        return $boxes;
    }

But there is no difference. There is not this view: http://imgur.com/a/mh1QH

In LearnDash I see this: http://imgur.com/a/JH4sY

Thank you for your help!