Hi, I am presently unable to enable hardware stereo in DS 3.1 using the Accelrys recommended nVidia driver 266.45, and switching off hardware acceleration makes no difference. System is: Win 7 Pro x64; HP xw8400 workstation; 4 GB RAM; Quadro FX 1400 graphics card; StereoGraphics-RealD CrystalEyes 3.0 stereo headset. Hardware stereo previously worked well under XP Pro SP2/3, and Accelrys supported Quadro FX 1400 graphics card up to DS 2.0, but do not seem to support this card now. A pity, as it was an expensive purchase not long ago. The recommended nVidia graphics driver (266.45), however, does support the QFX 1400 card, so I am wondering if there is a bug in the DS 3.1 software that does not allow correct addressing of the recommended nVidia driver? Any help would be greatly appreciated. Thank you.