Not supported in other words would mean that the claimed features may not work as advertised on your hardware and the customer and tech support will not bother with you. Technically this means that they didn't test Photoshop during the programming if it works on your graphics hardware (video card) or they didn't bother debugging problems on it. To fix this problem, check what hardware is listed as supported on their site and get one.
- What is the make and model of your video card/chip?
- Is that make/model supported, as Emil.Emil asks?
- What is your OS?
- What is the video driver, number and date, that is installed?
- Is that the latest?