Load swf on loaded swf?

Question

I'm on a project created in Flash Builder 4.7 and Flash Professional CS6, nice. I need the project load's a SWF inside the "preloaded SWF",

• The first SWF, loads a second SWF,

• This second SWF would be the "Home" of the project.

At this point, it work's perfectly. But when the "Home" try to load other external SWF, it says :

[IOErrorEvent type="ioError" bubbles=false cancelable=false eventPhase=2 text="Error #2124"]

The code of the first SWF:

public class InitialSWF extends MovieClip
{

  private var _loader_:Loader;

  private var _applicationContent_:DisplayObject;

  private var _loaderContent_:MovieClip;

  private var _loaderIcon_:MovieClip;

  public function InitialSWF()
  {
     super();
     _loader_ = new Loader();
     _loader_.contentLoaderInfo.addEventListener(Event.COMPLETE,_onComplete_,false,0,true);
     _loader_.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR,_onIoError_,false,0,true);
     _loader_.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS,_onProgress_,false,0,true);
     _loader_.load(new URLRequest("Home.swf"));
  }

  private function _onComplete_(param1:Event) : void
  {
     _applicationContent_ = _loader_.content;
     _applicationContent_.visible = true;
     stage.addChild(_applicationContent_);
     _applicationContent_.addEventListener("onApplicationComplete",_onApplicationComplete_,false,0,true);
     _loader_.contentLoaderInfo.removeEventListener(Event.COMPLETE,_onComplete_);
     _loader_.contentLoaderInfo.removeEventListener(IOErrorEvent.IO_ERROR,_onIoError_);
     _loader_.contentLoaderInfo.removeEventListener(ProgressEvent.PROGRESS,_onProgress_);
     _loader_.unload();
     _loader_ = null;
  }

  private function _onApplicationComplete_(tmpEvt:Event) : void
  {
     _applicationContent_.removeEventListener("onApplicationComplete",_onApplicationComplete_);
     _loaderContent_.addEventListener("loaderOut",_onLoaderOut_,false,0,true);
     // do something
  }

  private function _onLoaderOut_(param1:Event) : void
  {
     _loaderContent_.removeEventListener("loaderOut",_onLoaderOut_);
     _applicationContent_.visible = true;
     stage.removeChild(this);
  }

  private function _onIoError_(tmpError:IOErrorEvent) : void
  {
      trace(tmpError);
  }

  private function _onProgress_(param1:ProgressEvent) : void
  {
     var _progress_:Number = Math.round(param1.bytesLoaded / param1.bytesTotal * 100);
     //Do animation loading
  }

And the HomeSWF:

public class SecondarySWF extends Sprite
{

    private var _loader_:Loader;

    private var _loaderContent_:MovieClip;

    private var _loaderIcon_:MovieClip;

    private var _applicationContent_:DisplayObject;

    public function SecondarySWF()
    {
        this.addEventListener(Event.ADDED_TO_STAGE,this._GoLogin_,false,0,true);
    }

    public function _GoLogin_(tmpEvent:Event)
    {
        _loader_ = new Loader();
        _loader_.contentLoaderInfo.addEventListener(Event.COMPLETE,_onComplete_,false,0,true);
        _loader_.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR,_onIoError_,false,0,true);
        _loader_.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS,_onProgress_,false,0,true);
        _loader_.contentLoaderInfo.addEventListener(HTTPStatusEvent.HTTP_STATUS, httpStatusHandler);
        _loader_.load(new URLRequest("SecondarySWF.swf"));
    }

    private function httpStatusHandler(event:HTTPStatusEvent):void {
        trace(event);
    }

    private function _onComplete_(param1:Event) : *
    {
        _applicationContent_ = _loader_.content;
        _applicationContent_.visible = true;
        stage.addChild(_applicationContent_);
        _applicationContent_.addEventListener("onApplicationComplete",_onApplicationComplete_,false,0,true);
        _loader_.contentLoaderInfo.removeEventListener(Event.COMPLETE,_onComplete_);
        _loader_.contentLoaderInfo.removeEventListener(IOErrorEvent.IO_ERROR,_onIoError_);
        _loader_.contentLoaderInfo.removeEventListener(ProgressEvent.PROGRESS,_onProgress_);
        _loader_.unload();
        _loader_ = null;
        this.removeEventListener(Event.ADDED_TO_STAGE,this._GoLogin_);
    }

    private function _onApplicationComplete_(param1:Event) : void
    {
        _applicationContent_.removeEventListener("onApplicationComplete",_onApplicationComplete_);
        _loaderContent_.addEventListener("loaderOut",_onLoaderOut_,false,0,true);
        // ..
    }

    private function _onLoaderOut_(param1:Event) : void
    {
        _loaderContent_.removeEventListener("loaderOut",_onLoaderOut_);
        //_applicationContent_.visible = true;
        //stage.removeChild(this);
    }

    private function _onIoError_(tmpError:IOErrorEvent) : void
    {
        trace(tmpError);
    }

    private function _onProgress_(param1:ProgressEvent) : void
    {
        var _progress_:Number = Math.round(param1.bytesLoaded / param1.bytesTotal * 100);
        // ..
    }
}

ConsoleChromeSWF <-This is an image of the Google console.log, and catch this:

• start InitialSWF
  
• Load HomeSWF
  
• Complete loaded of HomeSWF
  
• Start HomeSWF
  
• The link of the Secondary SWF (censored/hidden from public)
  
• Load SecondarySWF
  
• ERROR

I don't know why the Secondary SWF is 100% loaded but return an error... Regards!