Sound doesn't play :-(

hi all friendly helper peeps

i have a problem, i have a sound file that needs to play in flash

Everything works fine on my desktop but as soon as i load the site onto the webserver the sounds dont play anymore… i am using .loadSound to load the file into the page when a button is clicked and i have a text box that displays a percentage of the .onLoadProgress

now if i do a simulate download from inside the flash console the percentage loads fine and the song play, but as soon as i upload the files to a webserver when i click the play button the text field shows NaN, which im guessing means its not loading the file…

Anyone have any idea why?
Any help would be so appreciated

here is the code

_root.MediaType.play1.onRelease = function()
{
//stopAllSounds();
downloadTrack(01);
}

function downloadTrack (trackNumber:Number)
{
track1.loadSound(“sound/Track01.mp3”, false);
var nProgressID:Number = setInterval(updateProgress, 100);
function updateProgress():Void
{
var nPercent:Number = Math.round(track1.getBytesLoaded() / track1.getBytesTotal() * 100);
_root.MediaType.track1_txt.text = nPercent + “%”;
}
track1.onLoad = function(bSuccess:Boolean):Void
{
if(bSuccess)
{
this.start();
_root.MediaType.track1_txt._visible = false;
}
}
}