removeChild Problem

1

hi guys,
I found a problem again,the situation is that my player(man) inside GameStage MovieClip hits the GameStage.MyCar as it hits i want player to remove then the rest of the task will be accomplished by the GameStage.MyCar.The error is that

var man:Object;
var MyCar:Object;

ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
	at flash.display::DisplayObjectContainer/removeChild()
	at ManGameStreetboy/gameLoop()

;

public function createman() 
    {
	man = new Object();
	man.mc = GameStage.man;
     }

public function createCar()
	{
	  MyCar = new Object();
	  MyCar.mc = GameStage.car;}

this.addEventListener(Event.ENTER_FRAME, gameLoop);
public function gameLoop(event:Event)
		{
			if (lastTime == 0) lastTime = getTimer();
			var timeDiff:int =  getTimer()-lastTime;
			lastTime += timeDiff;		
	 if((man.mc.hitTestPoint(MyCar.mc.x,MyCar.mc.y,true))||(man.mc.x>MyCar.mc.x+15))
		    {moveCar(MyCar,timeDiff);
		   GameStage.removeChild(GameStage.man);
		     }
		      else if(!(man.mc.hitTestObject(MyCar.mc)))
		      {  
			   moveCharacter(man,timeDiff);
		      }
		}