mp3 play/stop button scope problem

I have an swf (jukebox) with a new sound variable which contains loads an mp3,
there are 2 buttons that play/pause (code below):

var attach_song:Sound = new Sound();
playsong.onRelease = function() {
stopsong.onRelease = function() {

The play/stop buttons work fine here, and song plays.

Now I also have a main swf which loads the swf above into an empty movie clip (loadMovie(“jukebox.swf”) etc). when I hit the play button via this swf nothing happens.
I have everything from the jukebox swf set up correctly I think, including linkage.

Anyone have any ideas? I presume its something to do with scope?
its been a while since I’ve used Flash and a little rusty!