How to Relocate the Secondary Navigation below fixed Header in Altitude Pro

I am struggling getting the Secondary Menu to be sticky along with the Primary Menu using your tutorial.
http://www.commercialsiteplan.com/dev/services/site-planning-services/.

I am using Altitude Pro theme along with Bill Erikson’s Genesis Subpages as a Secondary Menu Plugin.

In the functions.php:

I added this:
/**
* Submenu items in secondary menu
*
* Assign the same menu to ‘header’ and ‘secondary’.
* This will display the current section’s subpages in ‘secondary’
*
* @author Bill Erickson
* @link https://gist.github.com/billerickson/e337bdd2397957036f95/
*
* @param array $menu_items, menu items in this menu
* @param array $args, arguments passed to wp_nav_menu()
* @return array $menu_items
*
*/
function be_submenu_items_in_secondary( $menu_items, $args ) {

// Only run on ‘secondary’ menu location.
if( ‘secondary’ !== $args->theme_location )
return $menu_items;

// Find active section
$active_section = false;
foreach( $menu_items as $menu_item )
if( ! $menu_item->menu_item_parent && array_intersect( array( ‘current-menu-item’, ‘current-menu-ancestor’ ), $menu_item->classes ) )
$active_section = $menu_item->ID;
if( ! $active_section )
return false;

// Gather all menu items in this section
$section_ids = array( $active_section );
foreach( $menu_items as $menu_item )
if( in_array( $menu_item->menu_item_parent, $section_ids ) ) {
$sub_menu[] = $menu_item;
$section_ids[] = $menu_item->ID;
}

return $sub_menu;
}
add_filter( ‘wp_nav_menu_objects’, ‘be_submenu_items_in_secondary’, 10, 2 );

I changed the last line of the code below from this:

//* Reposition the secondary navigation menu
remove_action( ‘genesis_after_header’, ‘genesis_do_subnav’ );
add_action( ‘genesis_header’, ‘genesis_do_subnav’, 5 );

To this to move the secondary nav into the header and below the primary nav:

add_action( ‘genesis_header’, ‘genesis_do_subnav’, 12 );

Can you show me how to get the Secondary Menu sticky along with the Primary Navigation using your tutorial? I followed the steps and the secondary Menu did not stick with with Primary Menu.