hello, i am having a problem with xvid movies encoded with an ac3 soundtrack. every time i try to play the movie it crashes me out to the dreaded blue screen of death (bsd). i used to be able to play them just fine, but then i reinstalled windows (to much junk on previous install) and put in a sound blaster audigy gamer sound card. i was using the on board sound but that sounded like dog squeeze. i do not have the spdif hooked up at this time, but the sound card says it is capable of playing ac3 files. ac3 files actully show up in the file associations for one of the playback apps that came with the card. i also have power dvd and bsplayer installed. bs player will play back the movie with no sound, power dvd crashes the pc as well as windows media 9. thanks in advance for any assistance.