unloadMovie doesn't work

programming flash
1

hi there…i have a little problem with the unloadMovie command…
you see…

i have a button which is mc2_about

here is the code

menu.nav.mc2_about.onRelease = function() {
if(nextMovie!="portfolio2.swf"){
	//set the variable that holds the name of the movie to be loaded
	nextMovie="portfolio2.swf";
	_root.container.loadMovie("portfolio2.swf",1);
	//tell the currently loaded content movie to play it's outro animation
	main_zoom.gotoAndPlay("unload");
	_level1.unloadMovie()
}

	};

where i want to unload **level1 **which is a scrollbar with a text
and load the portfolio section in an empty container…
to help you with my structure i want to load in an empty container the
swf’s of the main navigation (home- portfolio,etc) and the sub-menus of it’s categories[about me-print-web design) into levels…
is there a simpliest way of doing that?
any help would be good…!! :wink: