SoundMixer.stopall() but background music

programming flash
1

I have project that requires the audio/visual to sync. I have a main swf that loads other external swfs (which has streaming sync Sound). So, to load ‘movie 2’ I have to call the following function:

function clickHandler2(event:MouseEvent):void
{
SoundMixer.stopAll();
request.url = “movie2.swf”;
loader.load(request);
}

Problem is this stops the background music in the main swf. Is there a way just to stop the loaded swf sound and not background music? I tried loader.SoundMixer.stopAll() but only get errors.