gotoAndPlay on nested movieclips?

1

Greetings,

I appreciate you taking the time to look at this problem i am having.
I am still transfering from AS2 to AS3 and right now i am having a very annoying problem.

THE STRUCTURE:
Maintimeline contains 2 buttons that i want to use to access children in a bunch of movieclips.
rectangle_mc has circle_mc circle_mc contains xx_mc xx_mc contains wtf_mc



stop();

function playTimeline (evt:MouseEvent):void {
    this.rectangle_mc.gotoAndPlay(2);
}
start_btn.addEventListener (MouseEvent.MOUSE_DOWN, playTimeline);

/*This code errors out*/
    function EndTimeline (evt:MouseEvent):void{
        this.rectangle_mc.circle_mc.xx_mc.wtf_mc.gotoAndPlay(2);
}
stop_btn.addEventListener (MouseEvent.MOUSE_DOWN,EndTimeline);

placed on frame 1 on maintimeline

Why can’t flash see my nested movieclips? I remember in AS2 you could go down the line:
_root.movieclipA.movieclipB.movieClipC.movieclipD.movieclipE.gotoAndPlay(frame#);

Any Help Appreciated Thanks,

Shadysquirrel