Levels in CS3

I am loading some external swfs onto my page, and additionally have a dynamic menu that for some reason, although being on the top layer in flash, apears on a lower level than my loaded content (so the menu turns out under the loaded swfs) How can i control the level of these loaded swfs? (i have put my code below)
thanks!

var myRequest:URLRequest = new URLRequest(“external.swf”);
var myLoader:Loader = new Loader()
myLoader.x=592.9;
myLoader.y=0;
myLoader.load(myRequest);
addChild(myLoader);