Soundblaster Audigy 2 ZS Problems! Help

I have installed the soundcard using drivers from the original installation
disk. This cleared up not having sound at all upon first Vista install.
However when I calibrate the 5.1 sound it doesn't seem to work properly. I
can set it up correctly. The when I go to the test feature where it brings a
noise through each speaker "Front Left", "Front Right", "Centre", they do not
seem to work properly. I cannot get 5.1 to work. HOwever in XP it is all
completely setup correctly so I know that it is not a wiring error on my part.
I tried installing a driver from Creative but to no avail. Anyone else
having similar problem? What should I try next?