ActionScript 3.0 :: External Swf Functionality?

For a webservice i'm building a website that functions as a shell for certain service, which are loaded externally...The code I use for importing the external swf's is as follows:

Code:
function loadComponent(swf)
{
var request:URLRequest = new URLRequest(swf);
var loader:Loader = new Loader();
loader.load(request);
components_mc.addChild(loader);
}

So far so good..the external swf is loaded and functions ok on first glance...However, there is a problem with some buttons..I have a menu with five buttons (blue buttons with a different colour shade). These buttons function well (are accessible) when the swf operates stand alone. When I embed the swf, the top three buttons don't function properly(are not accessible)...I cant even guess for the reason.