Please Help:

I have sound loop auto-playing when launched but also have a "sound on" and "sound off" to turn that loop on and off. (which continually plays in different scenes)

I created a "sound object" to control the loop.
PROBLEM: If the user clicks on the"sound on" button when it the swf first launches, the sound doubles up!
(The auto-play sound loop is just a sound placed on the stage.) How can I prevent this from happenning??