Drag and Drop with snap and response

Question

Ok, first of all I'm new to all of this as I'm just doing some parttime work. I'm trying to make a drag and drop game where the images (imported and made into movie clips with instance names "peg1 - peg7") are to be dragged onto targets (images, made into movie clips with instance names "targetpeg1-targetpet7").
Here's my code and it comes up with two errors -
ReferenceError: Error #1069: Property parent not found on builtin.as$0.MethodClosure and there is no default value.
at Gametake1_fla::MainTimeline/fl_ReleaseToDrop()
Please help!!! Thanks a bunch!
Amy
peg1.buttonMode = true;
peg2.buttonMode = true;
peg3.buttonMode = true;
peg3.buttonMode = true;
peg4.buttonMode = true;
peg5.buttonMode = true;
peg6.buttonMode = true;
peg7.buttonMode = true;
peg1.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
peg2.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
peg3.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
peg4.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
peg5.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
peg6.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
peg7.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
function fl_ClickToDrag(event:MouseEvent):void
event.currentTarget.startDrag();
reply_txt.text = "Drag the image to its correct location"
peg1.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
peg2.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
peg3.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
peg4.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
peg5.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
peg6.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
peg7.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
function fl_ReleaseToDrop(event:MouseEvent):void
event.currentTarget.stopDrag();
var myTargetName:String = "target" + event.target.name;
var myTarget:DisplayObject = getChildByName("myTargetName");
if (event.target.stopDrag != null && event.target.stopDrag.parent == myTarget){
    reply_txt.text = "Good Job!";
} else {
    reply_txt.text = "Try Again!";
function checkTarget(drag){
if (drag.hitTest(targetpeg1)) {
trace(drag+" has been dropped on greyCircle");
} else {
trace("you missed the target");

Answer 1

use:
peg1.buttonMode = true;
peg2.buttonMode = true;
peg3.buttonMode = true;
peg3.buttonMode = true;
peg4.buttonMode = true;
peg5.buttonMode = true;
peg6.buttonMode = true;
peg7.buttonMode = true;
peg1.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
peg2.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
peg3.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
peg4.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
peg5.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
peg6.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
peg7.addEventListener(MouseEvent.MOUSE_DOWN, fl_ClickToDrag);
function fl_ClickToDrag(event:MouseEvent):void
event.currentTarget.startDrag();
reply_txt.text = "Drag the image to its correct location"
peg1.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
peg2.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
peg3.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
peg4.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
peg5.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
peg6.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
peg7.addEventListener(MouseEvent.MOUSE_UP, fl_ReleaseToDrop);
function fl_ReleaseToDrop(event:MouseEvent):void
event.currentTarget.stopDrag();
var myTargetName:String = "target" + event.currentTarget.name;
var myTarget:DisplayObject = getChildByName("myTargetName");
if (event.currentTarget.dropTarget){
if(event.currentTarget.dropTarget.parent == myTarget){
    reply_txt.text = "Good Job!";
} else {
    reply_txt.text = "Try Again!";