I am not sure what happened. A week or two ago, I checked and AE (CS3) saw and was using my openGL video card (Nvidia Quadro FX 570) but today, I checked and openGL is not an option anymore ("no compatible openGL card can be found"). It is not listed in preferences/previews, and is not an option under my comp window. But the card is evident and working when I check under Device Manager. I have the latest drivers for the video card. Any ideas?
--Dell Precision Workstation w/dual quad core
--4 GB of RAM w/ 3GB switch enabled
--Plenty of HD space