i have the same problem!
I just bought the Logitech x-530 5.1 speakers system.
I installed the latest drivers for SoundMAX built in soundcard in Asus P5B
I have configured windows Vista 32 bits, for a 5.1 system.
I ran the test and they ALL work when testing.
BUT when playing games, music, dvd's, CD's, EVERYTHING, I only get sound out of only Front L and R + Subwoofer and not from center + rear L and R
and strangesstranger, that's not true. I used to have the creative 5.1 running on windows XP, no matter what i played, sound came from evreywhere.
could anybody help me here??? this seems to be a pretty common problem but haven't found a solution....
pls pls pls !