Error in calling method of loaded swf

Question

I have two classes. One is loading class and another is Main2 class. Loading class is our document class of Load.fla.
The code of loading class is:
package
          import flash.display.MovieClip;
          import flash.display.SimpleButton;
          import flash.text.TextField;
          import flash.display.Loader;
          import flash.events.*;
          import flash.net.URLRequest;
          public class Loading extends MovieClip
                      private var url:String;
                      private var loader:Loader;
                      public function Loading()
                                  init();
                      private function init():void
                                  url='my_swf.swf';
                                  var request:URLRequest=new URLRequest(url);
                                  loader=new Loader();
                                  initListeners(loader.contentLoaderInfo);
                                  loader.load(request);
                      private function initListeners(dispatcher:IEventDispatcher):void
                                  dispatcher.addEventListener(Event.COMPLETE,completato);
                      public function onStartClick(event:Event):void
                                  trace("MenuStart")
                      private function completato(event:Event):void
                                  loader.contentLoaderInfo.content.addEventListener("startClick",onStartClick)
                                  addChild(loader);
                                  loader.y=10;
                                  var main2:Main2;
                                  main2=new Main2(this,MovieClip(loader.content));
And the code of Main2 class is :
package
          import flash.display.MovieClip;
          import flash.events.MouseEvent;
          import flash.events.Event;
          public class Main2 extends MovieClip
                      private var _fla:MovieClip;
                      private var mia_root:MovieClip;
                      public function Main2(fla:MovieClip,m:MovieClip)
                                  _fla=fla;
                                  mia_root=m;
                                  callClip();
                      private function callClip():void
                                  mia_root.test_mc.addEventListener(MouseEvent.CLICK, onStartClick);
                      private function onStartClick(e:MouseEvent):void
                                  trace("hi")
                                  dispatchEvent(new Event("startClick"));
Here I have loaded 'my_swf file in Loading class. Actually  there is one movie clip  in my_swf . its name is test_mc. When I press on this (test_mc) movie clip
I got trace value “hi”. But I dispatch one event startClick. I didnot listen in Loading class. How can I listen.

Answer 1

First, what's up with this huge font?
Second, your architecture feels convoluted and it can be simplified. But, assuming everything is OK, try this (inside function completato listener is added to the instance main2):
package
     import flash.display.MovieClip;
     import flash.display.SimpleButton;
     import flash.text.TextField;
     import flash.display.Loader;
     import flash.events.*;
     import flash.net.URLRequest;
     public class Loading extends MovieClip
          private var url:String;
          private var loader:Loader;
          public function Loading()
               init();
          private function init():void
               url = 'my_swf.swf';
               loader = new Loader();
               initListeners(loader.contentLoaderInfo);
               loader.load(new URLRequest(url));
          private function initListeners(dispatcher:IEventDispatcher):void
               dispatcher.addEventListener(Event.COMPLETE,completato);
          public function onStartClick(event:Event):void
               trace("MenuStart")
          private function completato(event:Event):void
               addChild(loader);
               loader.y = 10;
               var main2:Main2 = new Main2(this, MovieClip(loader.content));
               main2.addEventListener("startClick", onStartClick);
               addChild(main2);