ActionScript 3.0 :: How To Add Audio To Intro Movie In Game

I want to put audio on my intro movie [we're currently developing a game]. Once you press start button, a movie clip is being played together with an external sound. As soon as the user hits the skip button, the sound stops and you'll proceed to the main game. I cant make the sound STOP.

Code:
stop();
var introSound:Sound = new Sound();
var myChannel:SoundChannel = new SoundChannel();
introSound.load(new URLRequest("intromusic.mp3"));
function intro(e:Event):void{
[Code] .....

If I do this, the audio will play the moment I run it [and I don't want that to happen. the audio must be within the intro movie only].
Code:
stop();
var introSound:Sound = new Sound();
var myChannel:SoundChannel = new SoundChannel();
introSound.load(new URLRequest("intromusic.mp3"));
myChannel = introSound.play();