Deactivating a button after pressing another

I have some movieclips containing mp3´s, there is one the main movie clip with the background music playing constantly, and several others with short loops that sound only when u click on them…what I need is that when I clic one of the movie clips containing the short loop the MAin movie clip with the BG music to stop automatically…dont know if I explain myself… any ideas?? thanks a lot! :slight_smile: