Trying to run 3d Home design package called Sweethome3D under Knoppix. Comes is 32-bit and 64-bit flavours. 32-bit flavour runs with Kubuntu, but 64-bit flavour does not run with 64-bit Knoppix on 64-bit Acer X1301. No error messages, either running from GUI start or terminal start. Obviously something is missing or not set up right ... any immediate helpful suggestions?