ActionScript 3.0 :: Loading Interactive Swf?

I have this code from as2

this.onEnterFrame = function() {
_parent.timelinebeethoven.loadMovie("content/interactive/beethoven.swf");
}

That loaded up an external swf.Now I'm building an interface in as3 and I"m using this code to load up the movie with a button.

var myLoader:Loader = new Loader();
box2.addChild(myLoader);
beethoventime_mc.addEventListener(MouseEvent.CLICK , mouseDownHandler22);
function mouseDownHandler22(event:MouseEvent):void {

[code]....

It loads up great, and I thought I was all set - but the interactive elements are not working correctly.I think the problem is this "timelinebeethoven" and parent are really in the as2 code is not at all in my as3 code and they are really important. how to add in these two pieces into my as3 code?