Sound issues in a replay and....

Question

Below is code for a simple game that has music that starts as soon as the game scene is reached....third scene. There are 4 buttons associated with the music, volume up, volume down, stop music,  and play music.
As I said the music plays automatically at the start of the game, which I want. The up, down and stop volume work. The problems are.
First, if you stop the music the play button will not start the music again.
Second, none of the sound buttons work on a replay.
Would it help to have a link to the game? I will up load and put a link in in a few minutes.
I am stuck. I am new to actionScript. I am taking a class and the project is my final. I look forward to the day when Action
I appreciate your help!
Thanks,
Michelle
var bool:Boolean
var score: Number = 0;
var flag:Number = 1;
var myTimer:Timer = new Timer(1000);
var soundReq:URLRequest = new URLRequest("music.mp3");
var sound:Sound = new Sound();
var soundControl:SoundChannel = new SoundChannel();
var volumeControl:SoundTransform = new SoundTransform();
var flag2:Number = 1;
count_txt.text = "0";
myTimer.addEventListener("timer", timedFunction);
insect_btn.visible = false;
timer_txt.text = "20";
function disappear(e:MouseEvent):void
    if (timer_txt.text == "0")
        launch_btn.removeEventListener(MouseEvent.CLICK, target);
        insect_btn.removeEventListener(MouseEvent.CLICK, disappear);
    else
        insect_btn.visible = false;          
        count_txt.text = String(++score);
function target(e:MouseEvent):void
    if(flag==1)
        myTimer.start();
        flag = 0;
    insect_btn.x = Math.random()*625;
    insect_btn.y = Math.random()*475;
    insect_btn.visible = true;  
function timedFunction(e:TimerEvent)
   var tc:int= 20 - myTimer.currentCount;
    timer_txt.text = tc.toString();
    if (myTimer.currentCount >19)
        insect_btn.removeEventListener(MouseEvent.CLICK, disappear);
        launch_btn.removeEventListener(MouseEvent.CLICK, target);
        myTimer.stop();
        gotoAndPlay("done_frame");
function playAgain(evt:MouseEvent):void
    gotoAndPlay("play_frame");
if(!bool){
bool=true;
sound.load(soundReq);
soundControl = sound.play();
function playSound(event:MouseEvent):void
           if ( flag2 == 0)
            soundControl = sound.play();
            flag2 = 1;
function stopSound(event:MouseEvent):void
    soundControl.stop();
    flag = 0;
function increaseVolume(event:MouseEvent):void
    volumeControl.volume += .5;
    soundControl.soundTransform = volumeControl;
function decreaseVolume(event:MouseEvent):void
    volumeControl.volume -= .5;
     if (volumeControl.volume >= 0)
        soundControl.soundTransform = volumeControl;
    else
        volumeControl.volume = 0;
insect_btn.addEventListener(MouseEvent.CLICK, disappear);
launch_btn.addEventListener(MouseEvent.CLICK, target);
btn_play.addEventListener(MouseEvent.CLICK, playSound);
btn_stop.addEventListener(MouseEvent.CLICK, stopSound);
btn_up.addEventListener(MouseEvent.CLICK, increaseVolume);
btn_down.addEventListener(MouseEvent.CLICK, decreaseVolume);

Answer 1

The sound control buttons are available for the entire timeline. Other than when I went to turn in a different project today I have been playing with this problem.
Can you see anything wrong with the AS below? The only thing I can think of is it has to be a typo of some sort.  I gone over it so many times I don't think I even see it anymore.
function handleClick3(e:MouseEvent):void
    if ( e.target == btn_again)
    gotoAndPlay("play_frame", "game_scn");
btn_again.addEventListener(MouseEvent.CLICK, handleClick3);
I just got this error code.  It happened when I click more than once on the sound button during the replay. I havn't had much success when I google these errors. I will do that next. But just in case you recognize it. Here it is:
ArgumentError: Error #2068: Invalid sound.
    at flash.media::Sound/play()
    at find_the_butterfly_fla::MainTimeline/playSound()