Linkage Movieclip issue

1

Hi all,

I have one movieclip in (my.fla) and I’m trying to use the linkage to give a classname of “bgMC” to it. Unlike as2, there’s no more identifier.

The compiler gives me that error:
Error #1009: Cannot access a property or method of a null object reference.

while running debug in flash cs3, it stops at line:
this.backgroundMC.width = stage.stageWidth;

It can’t recognize the linkage that I have declared.
Does anyone know how to fix that?

The idea here is basically I want to reuse this class that I’ve made on others projects.

my main class:


package src
{
  import manageBG.bgFullScreen;

  private var bgScreen:bgFullScreen;
  private var test:MovieClip = new bgMC();

  public class main extends Sprite 
  {
     public function main():void 
     {
        this.bgScreen = new bgFullScreen(test);
      }
  }

}

bgFullScreen class:


package manageBG
{
   import flash.display.Sprite;
   import flash.display.Stage;
   import flash.events.Event;
   import flash.display.MovieClip;
   

   public class bgFullScreen extends Sprite
   {
      private var backgroundMC:MovieClip;
      
      public function bgFullScreen(mc:MovieClip)
      {
         this.backgroundMC = new MovieClip();
         this.backgroundMC = mc;
         
         this.positionBG();
         this.initStage();
      }
      
      private function initStage():void
      {
         stage.addEventListener(Event.RESIZE, handleBG);
      }
      
      private function handleBG(evt:Event):void
      {
         this.positionBG();
      }
      
      private function positionBG():void
      {
         this.backgroundMC.x = 0;
         this.backgroundMC.y = 0;
         this.backgroundMC.width = stage.stageWidth;
         this.backgroundMC.height = stage.stageHeight;
         
         addChild(backgroundMC);
      }
      
   }
}