Actonscript to try to eliminate my scenes

I had my flash project broken up into 3 scenes. I'm trying to get them all linked using actionscript to eliminate the individual scenes. I have the first 2 working, but am having trouble linking my closing scene as well. Here's my code so far:

Code:

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package {
        import flash.display.MovieClip;
        import flash.events.Event;
        import flash.events.MouseEvent;
       
       
        public class ExampleOne extends MovieClip{
               
                public function ExampleOne () {
                       
                        this.playButton.addEventListener(MouseEvent.MOUSE_DOWN, moveIt);
                }
               
                private function moveIt (evt:MouseEvent):void {
                        this.mainScene_mc.gotoAndPlay (2);
                }
        }
}

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My closing scene should play right after the main scene but it isn't. Any help is MUCH appreciated.