I had the "exact" same problem with Z-640's on a new computer I had built last week. I took it back to the place it was built and they had failed to install some of the files on the Audigy 2 Sound Card installation disk. I don't know which ones they had left out, but when I took it home it worked fine. Hope this helps.
<P ID="edit"><FONT SIZE=-1><EM>Edited by bucko on 12/21/03 04:43 PM.</EM></FONT></P>