Please help Error # 2109: The null label frame was not found in the null scene.

excuse me, I'm in the middle of confusion because of this :

ArgumentError: Error # 2109: The null label frame was not found in the null scene.
at flash.display :: MovieClip / gotoAndStop ()
at _2411417040_Melinda_fla :: MainTimeline / showSoal ()
at _2411417040_Melinda_fla :: MainTimeline / setup ()
at _2411417040_Melinda_fla :: MainTimeline / frame86 ()
at flash.display :: MovieClip / gotoAndStop ()
at _2411417040_Melinda_fla :: MainTimeline / check Transition ()

even though the code is just copy-paste from what my lecturer gave me and adjust the frame, but why doesn't it still work the way I want it?

The codes are like this :

import flash.events.MouseEvent;

stop();
var nilai:int = 0;
var nomorSoal:int = 0;
var soalMaks:int = 10;
var hasil:hasil_mc;

var soal:Array =[["Tebak", "D", "Q", "P","C"],
["Tebak", "G", "N", "Z", "S"],
["Tebak", "Q", "P", "J", "O"],
["Tebak", "Iga", "Iya", "Itu", "Dia"],
["Tebak", "Abu", "Aku", "Aji", "Aki"],
["Tebak", "Senin besok", "Senin lusa", "Selasa besok", "Selasa kemarin"],
["Tebak", "Kemarin Jum'at", "Kemarin Minggu", "Jum'at kemarin", "Jum'at Minggu"],
["Tebak", "2 minggu", "2000", "200", "2 hari"],
["Tebak", "Rakun", "Panda", "Semut", "Macan"],
["Tebak", "Pelangi", "Pejabat", "Pejalan", "Pelayan"]];

var tempSoal:Array;
var tempJawaban:Array;
var gameAktif:Boolean = true;
var fps:int = 30;

function acakSoal():void{

tempSoal = soal.slice(0, soal.length);
for (var i:int = 0; i < soal.length; i++){
var acak:int = Math.floor(Math.random()*soal.length);
var temp:Array = tempSoal[acak];
tempSoal[acak] = tempSoal[i];
tempSoal[i] = temp;
}
}

function tampilkanSoal():void{
gambarMc.gotoAndStop(tempSoal[nomorSoal][10]);
soalTxt.text = tempSoal[nomorSoal][0];
tempJawaban = tempSoal[nomorSoal].slice(1, 5);
for (var i:int = 0; i < tempJawaban.length; i++){
var acak:int = Math.floor(Math.random()*tempJawaban.length);
var temp:String = tempJawaban[acak];
tempJawaban[acak] = tempJawaban[i];
tempJawaban[i] = temp;
}
jawab1.jawabanTxt.text = tempJawaban[0];
jawab2.jawabanTxt.text = tempJawaban[1];
jawab3.jawabanTxt.text = tempJawaban[2];
jawab4.jawabanTxt.text = tempJawaban[3];
}

function setup():void{
acakSoal();
tampilkanSoal();

jawab1.stop();
jawab2.stop();
jawab3.stop();
jawab4.stop();
jawab1.addEventListener(MouseEvent.CLICK, cekJawaban);
jawab2.addEventListener(MouseEvent.CLICK, cekJawaban);
jawab3.addEventListener(MouseEvent.CLICK, cekJawaban);
jawab4.addEventListener(MouseEvent.CLICK, cekJawaban);

jawab1.addEventListener(MouseEvent.MOUSE_OVER, mouseOver);
jawab2.addEventListener(MouseEvent.MOUSE_OVER, mouseOver);
jawab3.addEventListener(MouseEvent.MOUSE_OVER, mouseOver);
jawab4.addEventListener(MouseEvent.MOUSE_OVER, mouseOver);

jawab1.addEventListener(MouseEvent.MOUSE_OUT, mouseOut);
jawab2.addEventListener(MouseEvent.MOUSE_OUT, mouseOut);
jawab3.addEventListener(MouseEvent.MOUSE_OUT, mouseOut);
jawab4.addEventListener(MouseEvent.MOUSE_OUT, mouseOut);
}

function mouseOver(e:MouseEvent):void{
e.currentTarget.gotoAndStop(2);
}

function mouseOut(e:MouseEvent):void{
e.currentTarget.gotoAndStop(1);
}

function cekJawaban(e:MouseEvent):void{
var nomorJawaban:int = int(e.currentTarget.name.substr(5))-1;
if (tempJawaban[nomorJawaban] == tempSoal[nomorSoal][1]){
//jawaban benar
tampilkanHasil(1);
nilai+=10;
}else{
//jawaban salah
tampilkanHasil(2);
}
}

function tampilkanHasil(tp:int):void{
hasil = new hasil_mc;
hasil.x = 400;
hasil.y = 240;
hasil.gotoAndStop(tp);
hasil.scaleX = 0.2;
hasil.scaleY = 0.2;
hasil.tp = tp;
hasil.addEventListener(Event.ENTER_FRAME, efekPopup);
addChild(hasil);
//reset timer
gameAktif = false;
}

function efekPopup(e:Event):void{
var ob:Object = e.currentTarget;
if (ob.scaleX < 1){
ob.scaleX+=0.1;
ob.scaleY+=0.1;
}
}

setup();

function setupScore():void{
score_txt.text = String(nilai);
restart_btn.addEventListener(MouseEvent.CLICK, halamanAwal);
}

function halamanAwal(e:MouseEvent):void{
restart_btn.removeEventListener(MouseEvent.CLICK, halamanAwal);
gotoAndStop(1);
}

setupScore();

That's all, hoping for some fast resp thank you