Найти ошибку AS3 с перетаскиванием объекта на область мышкой

stop();
 
fw_btn42.addEventListener (MouseEvent.CLICK, F42);
function F42 (event: MouseEvent): void { 
if (flagw1V4 == true && flagw2V4 == true)  { 
      PravOtv[3]=1; 
      Bally[3]=15;  gotoAndStop (15); 
    } else { 
      PravOtv[3]=0; 
      Bally[3]=0; gotoAndStop (16); 
    } 
}
var flagw1V4:Boolean = false; 
var polw1V4X:Number; 
var polw1V4Y:Number; 
zad41.addEventListener(MouseEvent.MOUSE_DOWN, zad41Down); 
zad41.addEventListener(MouseEvent.MOUSE_UP, zad41Up); 
function zad41Down(event:MouseEvent):void {   
    zad41.startDrag (true); 
} 
function zad41Up(event:MouseEvent):void { 
    zad41.stopDrag(); 
if(zad41.x>oblast41.x && zad41.y>oblast41.y && zad41.x+zad41.width<oblast41.x+oblast41.width && zad41.y+zad41.height<oblast41.y+oblast41.height) {   
      flagw1V4=true; 
      polw1V4X=zad41.x; 
      polw1V4Y=zad41.y; 
      answered15[0]=1; 
    } else { 
      flagw1V4=false;
      polw1V4X=zad41.x; 
      polw1V4Y=zad41.y; 
      answered15[0]=1; 
    } 
}
 
var flagw2V4:Boolean = false; 
var polw2V4X:Number; 
var polw2V4Y:Number; 
zad42.addEventListener(MouseEvent.MOUSE_DOWN, zad42Down); 
zad42.addEventListener(MouseEvent.MOUSE_UP, zad42Up); 
function zad42Down(event:MouseEvent):void {   
    zad42.startDrag (true); 
} 
function zad42Up(event:MouseEvent):void { 
    zad42.stopDrag(); 
if(zad42.x>oblast42.x && zad42.y>oblast42.y && zad42.x+zad42.width<oblast42.x+oblast42.width && zad42.y+zad42.height<oblast42.y+oblast42.height) {   
      flagw2V4=true; 
      polw2V4X=zad42.x; 
      polw2V4Y=zad42.y; 
      answered15[0]=1; 
    } else { 
      flagw2V4=false;
      polw2V4X=zad42.x; 
      polw2V4Y=zad42.y; 
      answered15[0]=1; 
    } 
}