Active menu color works on all but one menu item

Perhaps this is because it’s more difficult than I would’ve expected (I’ve highlighted active menu items before on lots of other sites), I can’t for the life of me figure out why the “portfolio’ menu item will not show orange when selected
http://dev.kimkirbyinteriordesign.com/portfolio/

– all the other top level menu items work? It would also be great to highlight the active sub menu item as well. So far, based on tests and researching past posts in this forum I’ve come up with the following CSS to get me where I am presently…

#top .header_color .current-menu-item a {
	color:#ff8500!important;
}
.current_page_ancestor.active-parent-item > a {
	color: #ff8500!important;
}
.current_page_ancestor.active-parent-item > .sub-menu {
	background-color:#FFF!important;
}
#top #wrap_all .sub-menu {
	color:#052465!important;
	background: #FFF!important;
}
#top #wrap_all .avia_mega_div {
	color:#052465!important;
	background: #FFF!important;
}
#top .main_menu .menu ul li a {
	background: #FFF!important;
	color: #052465!important;
}
#top .main_menu .menu ul li a:hover {
	background: #FFF!important;
	color: #ff8500!important;
}

Any help is appreciated!