As3 drag and drop

Question

hi all
i have a problem with my drag and drop jigsaw
everything worked fine before i added the draggable content to a movieclip called pieces_mc which should goto the nextFrame after a target has been filled.
wondering if you can see what is wrong, i believe i need to point the movieclip to event.target but how to do this??
stop();
var startX:Number;
var startY:Number;
var counter:Number=0;
var tries:Number=0;
finished_mc.visible=false;
help_file_mc.visible=false;
pieces_mc.jig1_mc.buttonMode=true;
pieces_mc.jig2_mc.buttonMode=true;
pieces_mc.jig3_mc.buttonMode=true;
pieces_mc.jig4_mc.buttonMode=true;
pieces_mc.jig5_mc.buttonMode=true;
pieces_mc.jig6_mc.buttonMode=true;
pieces_mc.jig7_mc.buttonMode=true;
pieces_mc.jig8_mc.buttonMode=true;
pieces_mc.jig9_mc.buttonMode=true;
pieces_mc.jig10_mc.buttonMode=true;
pieces_mc.jig1_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
pieces_mc.jig1_mc.addEventListener(MouseEvent.MOUSE_UP, dropIt);
pieces_mc.jig2_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
pieces_mc.jig2_mc.addEventListener(MouseEvent.MOUSE_UP, dropIt);
pieces_mc.jig3_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
pieces_mc.jig3_mc.addEventListener(MouseEvent.MOUSE_UP, dropIt);
pieces_mc.jig4_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
pieces_mc.jig4_mc.addEventListener(MouseEvent.MOUSE_UP, dropIt);
pieces_mc.jig5_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
pieces_mc.jig5_mc.addEventListener(MouseEvent.MOUSE_UP, dropIt);
pieces_mc.jig6_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
pieces_mc.jig6_mc.addEventListener(MouseEvent.MOUSE_UP, dropIt);
pieces_mc.jig7_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
pieces_mc.jig7_mc.addEventListener(MouseEvent.MOUSE_UP, dropIt);
pieces_mc.jig8_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
pieces_mc.jig8_mc.addEventListener(MouseEvent.MOUSE_UP, dropIt);
pieces_mc.jig9_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
pieces_mc.jig9_mc.addEventListener(MouseEvent.MOUSE_UP, dropIt);
pieces_mc.jig10_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);
pieces_mc.jig10_mc.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) {
  event.target.play();
  pieces_mc.nextFrame();
  borders_mc.parent.setChildIndex(borders_mc, borders_mc.parent.numChildren-1);
  //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;
  tries++;
if (tries>=15) {
  //tries_txt.text="fi";
if (counter==10) {
  borders_mc.visible=false;
  targetjig1_mc.visible=false;
  targetjig2_mc.visible=false;
  targetjig3_mc.visible=false;
  targetjig4_mc.visible=false;
  targetjig5_mc.visible=false;
  targetjig6_mc.visible=false;
  targetjig7_mc.visible=false;
  targetjig8_mc.visible=false;
  targetjig9_mc.visible=false;
  targetjig10_mc.visible=false;
  pieces_mc.jig1_mc.visible=false;
  pieces_mc.jig2_mc.visible=false;
  pieces_mc.jig3_mc.visible=false;
  pieces_mc.jig4_mc.visible=false;
  pieces_mc.jig5_mc.visible=false;
  pieces_mc.jig6_mc.visible=false;
  pieces_mc.jig7_mc.visible=false;
  pieces_mc.jig8_mc.visible=false;
  pieces_mc.jig9_mc.visible=false;
  pieces_mc.jig10_mc.visible=false;
  finished_mc.visible=true;
  //reply_txt.text="Congrats, you're finished!";
thanks in advance for any help
fonzio

Answer 1

hi kglad
well the problem is before i put all of the separate jigsaw pieces into a movieclip called pieces_mc everything was fine, but not now
i think i need to tell event.target where to find the pieces but i dont know how
you see i have the target clips in a movieclip on the stage and the pieces themselves inside another movieclip on stage
so i can no longer pick up a piece
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at gameone_fla::gameone_3/frame1()
at flash.display::MovieClip/gotoAndPlay()
at gameone_fla::MainTimeline/nextk()
I get this error but this has nothing to do with it as it worked fine before and i havent touched this
this just moves it to the next frame ie the jigsaw
intro_2.my_btn.addEventListener(MouseEvent.CLICK, nextk);
function nextk(event:MouseEvent):void {
  gotoAndPlay(2);
any ideas?
thanks
fonzio