Menu Location?

I've successfully re-ordered my admin menu using the function below, but for some reason my custom support system menu (added by the support system plugin) is refusing to move. It is still appearing above the Appearance menu instead of below it. I would like it on the very end under Appearance (widgets.php) menu. I have copied the link to the support system page correctly the way I was told to do so to add it to this function. Here is what I'm using atm:

function custom_menu_order($menu_ord) {
       if (!$menu_ord) return true;
       return array(
        'index.php', // DASHBOARD
        'edit.php', // POSTS
        'edit.php?post_type=page', // PAGE
        'edit-comments.php', // COMMENTS
        'edit.php?post_type=wpfc_sermon', // SERMONS
        'upload.php', // MEDIA
        'link-manager.php', // LINKS
        'profile.php', // PROFILE
        'widgets.php', // APPEARANCE
        'admin.php?page=incsub_support', // DF SUPPORT
   add_filter('custom_menu_order', 'custom_menu_order');
   add_filter('menu_order', 'custom_menu_order');