i have installed new drivers and software and still nothing i only get 2 speakers to work. I can select 5.1 and when i do only the front left right speakers work, nothing else has sounds. so i cant hear any talking and my reciever will only see the LPCM mode, no sound comes through the DD. ive tried DVDs, mkv, avi's nothing will work in DD 5.1. And i cant get 5.1 sound out of LPCM mode. Im using XP with the asus M2a-vm HDMI. What do i need to buy to get DD 5.1 with my MKV files thx.