How to make music fade out

i am working on a movie, and i
have one quick question:

How do i fade the music out. Everytime
i try to use the fade out effect in movies,
it doesn’t work!!

plz answer as quickly as possible!!

Are you using “Start” as Sync in the sound properties?

It’s easy. Let’s say you have a movieclip named mc1 and when you click it the sound fades out. The sounds name is sound1.
//This is what you write in the main frame
mc1.onRelease = function() {

_root.onEnterFrame = function() {
if (mc1_rel) {
if (sound1.volume>0) {
} else {

Thanks. That helped