I just bought a US-logic Lapazz 8x6 graphic tablet for my Mac ibook G4 laptop. I followed the instructions and installed the drivers for it then pluged it in using the usb, the lcd light lit up and I tried the pen and as soon as I touch the tablet the arrow/cursor jumps to the bottom right hand part of my screen and its stuck. It won't move and the lcd light is on. Whats the problem, is there a setting that is disabling the graphic tablet??? Please help this would be a great tool for me and my computer.