[Mobhack]

Did you remember to set the taskbar autohide to off, as detailed in the game guide section Game Installation - the big red box with the flashing heading in yellow text "PLEASE READ THIS NOTE!") in the next section entitled Running WinSPMBT from the GameOptions Programme. It's supposed to be rather hard to miss.

Having the taskbar in autohide mode sends the wrong screen info to the application. (Nothing I can fix - its part of the legacy graphics engine library).