Can't change Strat Map Resolution to 16 bit

[isd71]

I have the lastest drivers and reinstalled the directx that came with the game, but every time I select a 16 bit resolution it acts like its going to change but then it comes back and hasn't change the resolution. I didn't have this problem with RTR.

Here is a pick of what the map looks like on 32 bit resolution, this is why I want to change. Notice the black ports, invisible standards except for the logo, and the invisible family member and his army.