AS2 Independent volume control of sound object and streaming audio

I've got a presentation that features an audio loop for background music and streaming audio on the timeline for the voice over.

When I try to lower the volume of the background music (sound object), it also effects the voice over (streaming).

I'm a total novice, so try to use laymen's terms

This is on Frame 1:

snd = new Sound(myLoopMC);
snd.attachSound("myLoop01");

onLoad = function () {
    snd.start(0,5);
};
n = 0;
snd.setVolume(n);

And this is on the Frame that contains the movieclip with the voice over.  I'm trying to fade the background music ONLY:

onEnterFrame = function () {
    n += -1;
    if (n<=10) {
        n = 10;
    }
    snd.setVolume(n);
};

stop();