Help with reference

Hi guys,

I need a little help.

My Main Class:

 
package {
 
 // Flash Classes
 import flash.display.MovieClip;
 import flash.events.Event;
 
 import core.InitStage;
  
 public class Main extends MovieClip {
  
  private var projectSetupStageFullscreen:Boolean = true;  
  public var mainBg:MovieClip = new MovieClip();
  private var initStage:InitStage;
   
  public function Main() {
   
   initStage = new InitStage(this);
   
  }
 }
}

and here’s the InitStage Class:

 
package core {
 
 import flash.display.MovieClip;
 import flash.display.StageAlign;
 import flash.display.StageScaleMode;
 
 public class InitStage extends MovieClip {
  
  private var stageRef:MovieClip;
  
  public function InitStage (stageReference:MovieClip):void {
   
   stageRef = stageReference;
   
   if (stageRef.projectSetupStageFullscreen) {
    stage.scaleMode = StageScaleMode.NO_SCALE;
    stage.align = StageAlign.TOP_LEFT;
   }
   
  }
 }
}

In result I receive:
ReferenceError: Error #1069: Property projectSetupStageFullscreen not found on Main and there is no default value.
at core::InitStage()
at Main()

Can anybody help me figure out how to properly reference the projectSetupStageFill var from the InitStage class please?

Thx!