Music cuts out when timeline reverses

Hello,
I have a movieclip on my main timeline. Inside of the movie clip are a few goodies which load in a sound clip. I’m using this code to play the sound:


// create sound object
loop = new Sound(this);
loop.attachSound("muzak");
loop.start(0,100); // loop 100 times
loop.setVolume(25);

This works great, until the main timeline is navigated backwards. For example I have web pages on frames 146,147,148, 149, etc… The menu links go to anyone of the given frames/pages. If I navigate so that the timeline is advancing, the muzak keeps playing. However, if I’m on frame 150 and use a menu button which takes us back to 147 (or anything before 150 on the timeline), the sound quits.

Any ideas why this is happening and how to fix it?

Thanks!
Brian