Add submenu

Hello, I want to add submenu to Apperance menu for my theme.
(picture: http://i.imgur.com/BYHTYpn.png )
This is functions.php inside my theme.

add_action( 'after_setup_theme','auto_setup');

if ( ! function_exists( 'auto_setup' ) ):
function auto_setup()
{
	register_nav_menus( array('primary' =>'Primary Navigation') );

	add_action('admin_menu', 'register_my_custom_submenu_page');

	function register_my_custom_submenu_page(){
		add_submenu_page('themes.php','Options','Options',
			'Super Admin','Options','call_back');
	}
	function call_back()
	{
		echo '<h1>hello</h1>';
	}
}

But I can’t see a new submenu 🙁