I have recently acquired PrintFIX Pro, but having problem with the SpectroColorimeter. The instructions say when reading colour patches you can either press "Enter" or "Return" on the keyboard, or press the button on the Spectro itself. However, the button on the spectro doesn't seem to do anything. I have tried re-installing the software and tried on another computer, but no improvement. Am I doing something wrong, or is this a hardware fault?