Sound issue

I am loading an swf on level 1, top of the main one. I am fading the sounds out on the level 0 swf. It plays fine by itself, but when it loads on _level1, it does not play the sound. The swf loading has this code:

VO = new Sound();
VO.attachSound(“VO”);
VO.setVolume(100);
VO.start( 0 , 50000 );

VO.setVolume(vol);
vol = 100;

VO.setVolume(vol);