On my CSPPC+CVPPC, for "Graphics Mode" I can select "Window", "Double Buffered Screen" and "Triple Buffered Screen". Disregarding which one of those I choose, the "Warp3D Driver" selection is grayed out, saying "Hardware" as in using a hardware accelerated Warp3D driver.
I only think you can select something else there if there also is say a software rendering driver for Warp3D in your system, so there actually would be another option except "Hardware".
Doesn't it work at all in other modes than Window?
Regarding DoctorQ's post - for 15-bit modes to appear, you have uncheck the "HIDE15BIT" box in the Prefs/CyberGraphX program. A reboot after that is most likely required.
/Patrik