Hvordan stopper den efter hver sang?

Hej...
Jeg har en player, hvor den har følgende kode:

function loadAndPlay (some_cb) {
  holderMC.lyd.stop();
  loadMovie ("sound/"+some_cb.getSelectedItem().data+".swf", holderMC);
  holderMC.lyd.start (0, 999);
 
 
}

function afspil () {
    if (!pavs) {       
        holderMC.lyd.start (0, 999);       
}    else       
        holderMC.lyd.start (p, 999);
        pavs = 0;
}


function pause () {
    p = holderMc.lyd.position/1000;
    pavs = 1;
    holderMC.lyd.stop();
}
function sluk () {
    pavs = 0;
    holderMC.lyd.stop();
}


Hver track har en swf for sig selv og hedder track01.swk , track02.swf osv. osv.. med koden:

var mainTimeline = this;
/*
* Method: Sound.checkLoadProgress()
*  Desc: Checks progress of a load().
*        Called only by preload(). Reports download progress
*        by invoking a custom Sound.onBytesLoaded() handler.
*/
Sound.prototype.checkLoadProgress = function () {
  // Check how many kilobytes have loaded.
  var kbLoaded = Math.floor(this.getBytesLoaded()/1024);
  // Check the size of the file loading, in kilobytes.
  var kbTotal = Math.floor(this.getBytesTotal()/1024);
  // Calculate the percent complete.
  var percentDone = isNaN(Math.floor(kbLoaded/kbTotal * 100)) ?
                    0 : Math.floor(kbLoaded/kbTotal * 100);
  // Execute the onBytesLoaded() callback, which
  // typically would display load progress.
  this.onBytesLoaded(this.getBytesLoaded(),
                    this.getBytesTotal(),
                    kbLoaded,
                    kbTotal,
                    percentDone);
}

/*
* Method: Sound.clearLoadCheck()
*  Desc: Cancels an interval calling checkLoadProgress().
*/
Sound.prototype.clearLoadCheck = function () {
  // If there is a load interval for this Sound object...
  if (this.loaderID) {
    // ...stop calling it.
    clearInterval(this.loaderID);
  }
}

/*
* Method: Sound.preloadSound()
*  Desc: Begins the download of a sound file and executes
*        checkLoadProgress() every 200ms until the file has loaded.
*        Parameters are the same as Sound.loadSound().
*/
Sound.prototype.preloadSound = function (url, isStreaming) {
  // Always stop any previous preload before proceeding.
  this.clearLoadCheck();

  // Call checkLoadProgress() every 200 milliseconds.
  this.loaderID = setInterval(this, "checkLoadProgress", 200);

  // Load the Sound file.
  this.loadSound(url, isStreaming);
}

// =================
// Usage
// =================
// Create a sound object.
lyd = new Sound();

// Assign an onLoad() callback.
lyd.onLoad = function (success) {
  // Cancel the preload interval (REQUIRED!).
  this.clearLoadCheck();

  // If the load was successful...
  if (success) {
    // ...use the new Sound. For example, if the loaded
    // sound is an event sound, we can start it like this:
    // this.start();
    mainTimeline.loadMsg_txt.text = "100 %";
    _parent.playing=true;
  } else {
    // ...otherwise, perform failure operations.
    mainTimeline.loadMsg_txt.text = "Load failed.";
  }
}

// Assign an onBytesLoaded() callback. This is where each
// individual Sound object can decide what to do
// with the preload information.
lyd.onBytesLoaded = function (bytesLoaded, bytesTotal, kbLoaded, kbTotal, percentLoaded) {
  mainTimeline.loadMsg_txt.text = percentLoaded + " % nede";
}

// Load a streaming sound.
lyd.preloadSound("sound/ftc.mp3", true);
lyd.onSoundComplete = function() {
    this.preloadSound("sound/ftc.mp3", true);
}

Hvordan får jeg playeren til at stoppe efter nummeret er færdig...???? Iøjeblikket går den på uendeligt loop