A). Use that button next time, the one that says "Edit". I'm pretty sure penguin boy could hook you up with a picture of tht.
B). I've heard of sound problems because of the frequency, because of the length, and amongst other problems. Check and make sure you didn't leave anything easily overlooked out of the code (a simple punctuation can cause problems). Also make sure everything with your sound is right.
I'm no coder, but I know some bits, and until someone with more coding knowledge comes along... yeah.