Help with Sound Blaster Audigy 2 and 5.1

[Flatliner]

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.

 

[gothic]

I use WinDVD on my Soundblaster Live Platinum 5.1 and have to set the audio to "Analogue Output", otherwise I get the same problems as you.
If anyone has an answer I would also be very interested.
Thankyou

TOK