ActionScript 2.0 :: Create A Music Player?

I wanted to create an interesting music player that would show an animation that would basically open like a door, then show you buttons for each song to be played. I made the music play by creating the buttons with the music in the "Down" frame of the button. This worked great, it played my music and played music when you pressed another button. However the problem lies with having music playing and clicking on another button. Both songs play at the same time.

To fix it I looked around to find a command that would stop all music playing when any button was clicked so that when music was playing, and you clicked a button for another song, the previous song would stop playing, and play the next song. However all the commands I tried gave me errors, or they made the button unable to start the song.