Please stop the music! sound continues after another movie loaded

programming flash
1

Help!

I have multiple movies playing in a file based on button clicks. This part works fine, it’s just that the sound won’t stop from a previous movie (it hasn’t finished) when you click to see the next.

Here’s what I have:

var fileName:String=“begin.swf”;
var loader:Loader = new Loader();
var requestURL:URLRequest = new URLRequest(fileName);
loader.load(requestURL);
holder.addChild(loader);

airButton.addEventListener(MouseEvent.CLICK,airButtonListener);
earthButton.addEventListener(MouseEvent.CLICK,earthButtonListener);

function airButtonListener(event:MouseEvent):void {
loadFile(“air-JWfinal.swf”);
}

function earthButtonListener(event:MouseEvent):void {
loadFile(“earth-JW.swf”);
}

function loadFile(fileName:String):void{
requestURL.url = fileName;
loader.load(requestURL);
holder.addChild(loader);
}

Can anyone help???