Thank you and read that before. It does not say what e-on themselves uses. I have a second PC bought just 2 months ago, an Althon 3.2/1 Gig/ASUS K8N (somthing like that)with a nVidia Fx 5900 (128 Meg) and OpenGL in Vue4.22 did not work for me. OS use is XP Pro SP2. Not sure about Vue4 Pro and up as I do not have them. My current system is stilll my old faithful Dual P3 1Gig and the funny thing is that OpenGL works in earlier version of Vue4 but not after any upgrade with my old 3d labs video card. This system now has a nVidia Quad Pro series with latest driver, Vue4 and upgrades still does not work. Switching off OpenGL option is not a solution for me but just getting away from the problem.