ActionScript 3.0 :: MP3 Player - Trigger Event When Track Finish Playing

I'm working on an mp3 player. I want to trigger an event when the track finishes playing. I've created a function that will just trace a statement so that I know the event listener is working, but I can't seem to get it to trigger. Here is the playSong function in which the code is used:

Code:
function playSong(mySong:Number):void {
var myURL = my_songs[mySong].@URL;
playingTra = mySong;
current_song = mySong;
my_sound = new Sound();
[Code] .....

I tried to add in the following lines, but that instead institutes some playback issues:
Code:
if (my_channel){
my_channel.stop();
my_channel.removeEventListener(Event.SOUND_COMPLETE, stuff);
}