I told you above not to be happy with this YET! It means that your video subsystem doesn't support OpenGL sufficiently. If you have a decent video card, you should try to update its driver and try SU with tis hardware acceleration ON (otheriwse SU can become substantially slower). Now if you don't have a decent card (like if you have an integrated chipset for instance), you cannot do too much but use SU without hardware acceleration.