Hiya. I seem to be having trouble with my Sound Blaster Audigy 2 Platinum. I'm running some Logitech Z-680's through it and gone through everything on the installation CD for the sound card. However I get no sound from the rear or center speakers and the sub when I try to calibrate them, all I hear is the two front. I've updated the drivers to the newest versions available to no avail. Also another thing that happens is when I run WinDVD 5 and I set the audio on that to 5.1, I am not able to hear dialogue. I can hear music and the background noise, but no dialogue. But when I play music on Winamp I can hear it through all my speakers. Any help would be greatly appreciated.