I recently upgrade my computer and now it seems that my Promethean board is not compatible with my new operating system. My computer can be hooked up to a regular projector fine, but when the board is connected, my whole screen now flips sideways. I tried uninstalling and reinstalling the Activ software. I have also tried using the "image" button on the remote control, but nothing works. The board also still works fine with my old computer. Does anyone have any suggestions as to how to resolve this issue?