How to reload/reset the stage?

here is the entire code for frame1. in an attempt to reset the game after it was played.I added if(stage.contains(name)){ removeChild(name);}before anyaddChild(name);  Alas it appears that it totally ignores the if statements but it doesn't ignores the addChild , so it adds more items on top of the existing one. why is it not responding to the if and removeChild?

var score: int = 100;

var bcktcnt: int = 0;

scoreBoard.text = "" + score.toString();

var playLvlAgn: PlayLevelAgain = new PlayLevelAgain();

buttonA.addEventListener(MouseEvent.CLICK, release8Ball1);

buttonC.addEventListener(MouseEvent.CLICK, release8Ball2);

buttonB.addEventListener(MouseEvent.CLICK, release8Ball3);

//playLvlAgn.addEventListener(MouseEvent.CLICK, playAgain);

var yesh8bomb26: bomb26 = new bomb26();

var yesh8bomb27: bomb27 = new bomb27();

var yesh8bomb28: bomb28 = new bomb28();

var yesh8bomb2: bomb1 = new bomb1();

var yesh8bomb3: bomb1 = new bomb1();

var yesh8wall5: wall5 = new wall5();

var yesh8step: step = new step();

var yesh8allBuckets1: allBuckets = new allBuckets();

var yesh8allBuckets2: allBuckets = new allBuckets();

var yesh8DoorA: DoorA = new DoorA();

var yesh8DoorB: DoorB = new DoorB();

var yesh8DoorC: DoorC = new DoorC();

var add8bigGrayBall6: bigGrayBall6 = new bigGrayBall6();

var yesh8redHalfSwing: redHalfSwing = new redHalfSwing();

var yesh8gBall21: gBall21 = new gBall21();

var yesh8gBall24: gBall24 = new gBall24();

if (stage.contains(playLvlAgn)) {

  removeChild(playLvlAgn);

  trace("if--1")

}

addChild(playLvlAgn);

playLvlAgn.x = 122.80;

playLvlAgn.y = 387.10;

if (stage.contains(yesh8DoorA)) {

  removeChild(yesh8DoorA);

  trace("if--2")

}

addChild(yesh8DoorA);

yesh8DoorA.x = 255.6;

yesh8DoorA.y = 134.1;

yesh8DoorA.gotoAndStop(1);

if (stage.contains(yesh8DoorB)) {

  removeChild(yesh8DoorB);

  trace("if--3")

}

addChild(yesh8DoorB);

yesh8DoorB.x = 398.1;

yesh8DoorB.y = 126.5;

yesh8DoorB.gotoAndStop(1);

if (stage.contains(yesh8DoorC)) {

  removeChild(yesh8DoorC);

  trace("if--4")

}

addChild(yesh8DoorC);

yesh8DoorC.x = 288.85;

yesh8DoorC.y = 126.50;

yesh8DoorC.gotoAndStop(1);

if (stage.contains(yesh8allBuckets1)) {

  removeChild(yesh8allBuckets1);

  trace("if--5")

}

addChild(yesh8allBuckets1);

yesh8allBuckets1.x = 325;

yesh8allBuckets1.y = 324.95;

yesh8allBuckets1.gotoAndStop(1);

if (stage.contains(yesh8allBuckets2)) {

  removeChild(yesh8allBuckets2);

  trace("if--6")

}

addChild(yesh8allBuckets2);

yesh8allBuckets2.x = 197.75;

yesh8allBuckets2.y = 324.95;

yesh8allBuckets2.gotoAndStop(1);

if (stage.contains(add8bigGrayBall6)) {

  removeChild(add8bigGrayBall6);

  trace("if--7")

}

addChild(add8bigGrayBall6);

add8bigGrayBall6.x = 420.75;

add8bigGrayBall6.y = 120.80;

add8bigGrayBall6.gotoAndStop(1);

if (stage.contains(yesh8wall5)) {

  removeChild(yesh8wall5);

  trace("if--8")

}

addChild(yesh8wall5);

yesh8wall5.x = 431.30

yesh8wall5.y = 258.50;

if (stage.contains(yesh8step)) {

  removeChild(yesh8step);

  trace("if--9")

}

addChild(yesh8step);

yesh8step.x = 371.35;

yesh8step.y = 262.60;

yesh8step.gotoAndStop(1);

if (stage.contains(yesh8bomb26)) {

  removeChild(yesh8bomb26);

  trace("if--10")

}

addChild(yesh8bomb26);

yesh8bomb26.x = 321.3;

yesh8bomb26.y = 109.85;

yesh8bomb26.gotoAndStop(1);

if (stage.contains(yesh8bomb2)) {

  removeChild(yesh8bomb2);

  trace("if--11")

}

addChild(yesh8bomb2);

yesh8bomb2.x = 421.15;

yesh8bomb2.y = 82.15;

if (stage.contains(yesh8bomb3)) {

  removeChild(yesh8bomb3);

  trace("if--12")

}

addChild(yesh8bomb3);

yesh8bomb3.x = 421.15;

yesh8bomb3.y = 41.70;

if (stage.contains(yesh8gBall21)) {

  removeChild(yesh8gBall21);

  trace("if--13")

}

addChild(yesh8gBall21);

yesh8gBall21.x = 306.35;

yesh8gBall21.y = 128.25;

yesh8gBall21.gotoAndStop(1);

if (stage.contains(yesh8gBall24)) {

  removeChild(yesh8gBall24);

  trace("if--14")

}

addChild(yesh8gBall24);

yesh8gBall24.x = 241.9;

yesh8gBall24.y = 129;

yesh8gBall24.gotoAndStop(1);

if (stage.contains(yesh8redHalfSwing)) {

  removeChild(yesh8redHalfSwing);

  trace("if--15")

}

addChild(yesh8redHalfSwing);

yesh8redHalfSwing.x = 306.35;

yesh8redHalfSwing.y = 128.25;

yesh8redHalfSwing.gotoAndStop(1);

var balls: Array = [],

  ball: gBall4M;

for (var i: int = 0; i < 3; i++) {

  ball = new gBall4M();

  ball.x = 242;

  ball.y = 95 + i * 17;

  balls.push(ball);

  addChild(ball);

}

function release8Ball1(event: MouseEvent): void {

  yesh8DoorA.gotoAndPlay(1);

  gotoAndPlay(2);

  this.addEventListener(Event.ENTER_FRAME, handleCollision);

  this.addEventListener(Event.ENTER_FRAME, handleCollision6);

}

function release8Ball2(event: MouseEvent): void {

  yesh8DoorC.gotoAndPlay(1);

  gotoAndPlay(111);

  this.addEventListener(Event.ENTER_FRAME, handle8Collision3);

  this.addEventListener(Event.ENTER_FRAME, handle8Collision5);

}

function release8Ball3(event: MouseEvent): void {

  yesh8DoorB.gotoAndPlay(1);

  gotoAndPlay(201);

}

playLvlAgn.addEventListener(MouseEvent.CLICK, doLevelAgain);

function doLevelAgain(event: MouseEvent): void {

  gotoAndPlay(1);

}

stop();