removeChild help!

Hello I am a new for AS3 and I cannot find the way to remove the child I tried to remove in the class but it doesn’t work, at all.

I made several scenes and when it goes to next scene, want to remove all child displyed currently. Do I need to make removechild in the next scene? but it didn’t work.

The code in the current scene


 
rfid.addEventListener(PhidgetDataEvent.TAG, onTag1);
rfid.addEventListener(PhidgetDataEvent.TAG_LOST, onTagLoss1);
function onTag1(evt:PhidgetDataEvent):void {
 trace(evt);
 Tagoutput.text = evt.Data;
 
 if (Tagoutput.text=="01068dc249") {
 
  for (var c = 0; c < 20; c++) {
   var white:White = new White();
   white.x=900*Math.random();
   white.y=900*Math.random();
   addChild(white);
   trace("alive");
   white.name="white"+c;
  }
 }
}
 
function onTagLoss1(evt:PhidgetDataEvent):void {
 trace(evt);
 Tagoutput.text = "";
 
}
var myTimer2:Timer=new Timer(20000,1);
//Lisenter for Timer
myTimer2.addEventListener(TimerEvent.TIMER, timerListener2);
 
function timerListener2(e:TimerEvent):void {
 mytimeout2=true;
 trace("02-elephant");
 gotoAndStop(1, "02-elephant");
 
 
}
myTimer2.start();
stop();
 

The code in the class, movieclip(White)


package {
 
 import flash.display.MovieClip;
 import flash.events.*;
 
 
 
 public class White extends MovieClip {
 
 
  private var whiteRotation:Number;
 
 
  public function White() {
 
   //Assign a random rotation speed
   this.whiteRotation =  Math.random() * 10 - 5;
 
 
   //Assign a random scale
   this.scaleX = 0.5 + Math.random()* 0.2;
   this.scaleY = this.scaleX;
 
   //Assign a random alpha
   this.alpha = Math.random()*1; 
 
 
   //Add ENTER_FRAME where I do the animation
   this.addEventListener(Event.ENTER_FRAME, moveWhite);
 
  }
 
 
  private function moveWhite(e:Event):void {
   this.rotation += this.whiteRotation;
   this.x = this.x - Math.random()* 0.8 ;
   this.y = this.y - Math.random()* 0.8 ;
   if(MovieClip(parent).mytimeout2==true){
    //removeEventListener(Event.ENTER_FRAME,moveWhiteDying)
    MovieClip(parent).removeChild(this);
 
   }
  }
 
 
 }
}