Stop(); externaly loaded swf

How in the hell do I stop the content/timeline of a loaded swf file?


var myLoader:MovieClipLoader = new MovieClipLoader(); 
myLoader.addListener(this); 
myLoader.loadClip("360x250 Yaris hsd.swf", ad1); 


function onLoadInit(mc:MovieClip) { 
	mc._root.stop();
	mc._parent.stop();
	mc.stop();
}

None of this code stops the content in the external SWF. Any ideas on how to do this?