Help with movie clip and sound


I am trying incorporate a movie clip into my flash document and have imported it all fine but its not turning out so well when I export the flash.

It is a quicktime clip with audio and I programmed a button so that when you click it it plays the movie clip but when I export it the sound sounds of bad quality - under water like.

Also, I can get the clip to play but how do I tell it to stop when it has played once and then go back to the main menu?

If need be, I can get the movie clip and the audio file as different elements but I am not sure where to take it from there or if thats the best way to go about it.

Hopefully what I have written above is understandable… If anyone could help me on this that would be awesome!