Having trouble getting into tactical mode. The screen goes black, and error boxes pop up. The first box says "pixel format was invalid as specified", the next box says "action not supported", and the last box says "access to this surface is being refused because the surface memory is gone. The DirectDrawSurface object representing the surface should have Restore called on it". I'm playing the game in Windows XP mode on Windows 7 Ultimate 32-bit. Please speak English because my wife is going to be doing this and she is an accountant and I'm a geologist. Neither one of us knows code.