Talk to a class on a loaded swf

I have my main swf that loads another swf:


		private function initPreview(e:MouseEvent):void
		{
			
			v.stop();
			
			var req:URLRequest 		= new URLRequest("Presenter.swf");
			var ldr:Loader 			= new Loader();
			
			ldr.load(req);
			
			presenterHolder.addChild(ldr);
			
		}

In my loaded swf (presenter.swf) I have this code:


import com.dopeditor.VideoLoader;
import com.dopeditor.PlaylistLoader;
import com.dopeditor.HorizontalSlider;

stage.showDefaultContextMenu = false;

var lowStream:String = baseURL + "ate_indicators_low.flv";
var highStream:String = baseURL + "ate_indicators_high.flv";


var vid:VideoLoader = new VideoLoader(this,highStream);
var playlist:PlaylistLoader = new PlaylistLoader(this);
var volumeObj:HorizontalSlider = new HorizontalSlider(this);
addChild(vid);
addChild(playlist);
addChild(volumeObj);

Where I am loading I need to talk to that playlist object. In my PlaylistLoader class I have a function called setPlaylistID(). I need to somehow pass a number to that function of the loaded swf. I cant figure this out for the life of me. Can anyone help??