Reset object position when leaving the frame HELP!

Hi Guys,
I have a puzzle flash game. On the same frame I have a 15 sec timer mc. After 15 sec if user can’t finish puzzles, mc takes the user to the frame before puzzle game so user can start again. Problem is if the user will move few puzzles and than runs out of time, he goes back to the begining of game but the puzzles stay in the same position. I need something to reset the position of the puzzles when leaving the frame. Hope you have some ideas! Here is the puzzle game script:

var startX:Number;
var startY:Number;
var counter:Number = 0;

mcPuzzleOne.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
mcPuzzleOne.addEventListener(MouseEvent.MOUSE_UP, dropIt);
mcPuzzleTwo.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
mcPuzzleTwo.addEventListener(MouseEvent.MOUSE_UP, dropIt);
mcPuzzleThree.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
mcPuzzleThree.addEventListener(MouseEvent.MOUSE_UP, dropIt);
mcPuzzleFour.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
mcPuzzleFour.addEventListener(MouseEvent.MOUSE_UP, dropIt);

function pickUp(event:MouseEvent):void {
event.target.startDrag(true);
reply_txt.text = “”;
event.target.parent.addChild(event.target);
startX = event.target.x;
startY = event.target.y;
}

function dropIt(event:MouseEvent):void {
event.target.stopDrag();
var myTargetName:String = “target” + event.target.name;
var myTarget:DisplayObject = getChildByName(myTargetName);
if (event.target.dropTarget != null && event.target.dropTarget.parent == myTarget){
reply_txt.text = “Good Job!”;
event.target.removeEventListener(MouseEvent.MOUSE_DOWN, pickUp);
event.target.removeEventListener(MouseEvent.MOUSE_UP, dropIt);
event.target.buttonMode = false;
event.target.x = myTarget.x;
event.target.y = myTarget.y;
counter++;
} else {
reply_txt.text = “Try Again!”;
event.target.x = startX;
event.target.y = startY;
}
if(counter == 4){
gotoAndPlay(198);
}
}
mcPuzzleOne.buttonMode = true;
mcPuzzleTwo.buttonMode = true;
mcPuzzleThree.buttonMode = true;
mcPuzzleFour.buttonMode = true;