I am new to KooRaRoo and I enjoy what I see so far. However, my media library is on a FAT32 Drive hooked up to the main PC and the movies are in an .avi format. When I start up my PS3 to view movies, I get video, but no sound. I have research and adjusted what I could and still get nothing. Then out of frustration, I fire up my Xbox 360 I get both video and sound. What could cause my PS3 not playing the sound?