Problem with gotoandlearn mp3 player

Hi
I downloaded the mp3 player from gotoandlearn.com and the first part is workin correct, but when I add the controll buttons it stops playing the songs continously. It only play the first song and then stops. Any one having the same problem, or knows a way to fix it?
thnx..
here's the code by the way:

// Setup sound object
var s:Sound = new Sound();
s.onSoundComplete = playSong;
s.setVolume(75);

// Array of songs
var sa:Array = new Array();

// Currently playing song
var cps:Number = -1;

// Position of music
var pos:Number;

// Load the songs XML
var xml:XML = new XML();
xml.ignoreWhite = true;
xml.onLoad = function()
{
var nodes:Array = this.firstChild.childNodes;
for(var i=0;i<nodes.length;i++)
{
sa.push(nodes .attributes.url);
}
playSong();
}

xml.load("songs.xml");

// Play the MP3 File
function playSong():Void
{
s = new Sound();
if(cps == sa.length - 1)
{
cps = 0;
s.loadSound(sa[cps], true);
}
else
{
s.loadSound(sa[++cps], true);
}
playPause.gotoAndStop("pause");
}

// Pauses the music
function pauseIt():Void
{
pos = s.position;
s.stop();
}

// Pauses the music
function unPauseIt():Void
{
s.start(pos/1000);
}

// Music Controls

// Play/Pause Toggle
playPause.onRollOver = function()
{
if(this._currentframe == 1) this.gotoAndStop("pauseOver");
else this.gotoAndStop("playOver");
}

playPause.onRollOut = playPause.onReleaseOutside = function()
{
if(this._currentframe == 10) this.gotoAndStop("pause");
else this.gotoAndStop("play");
}

playPause.onRelease = function()
{
if(this._currentframe == 10)
{
this.gotoAndStop("playOver");
this._parent.pauseIt();
}
else
{
this.gotoAndStop("pauseOver");
this._parent.unPauseIt();
}
}

// Next Button
next.onRollOver = function()
{
this.gotoAndStop("nextOver");
}

next.onRollOut = next.onReleaseOutside = function()
{
this.gotoAndStop("next");
}

next.onRelease = function()
{
this._parent.playSong();
}


And in the xml:

<?xml version="1.0" encoding="UTF-8"?>
<songs>
<song url="chompSamba.mp3" />
<song url="cureForTheItch.mp3" />
<song url="sheLooksToMe.mp3" />
<song url="soWasRed.mp3" />
<song url="thisIsWar.mp3" />
</songs>