First check the electrical contacts on the bottom of the camera body for the MB-D200 and make sure that there is nothing causing a short between two or more of the contacts. Then put the rubber cover back on.
Is r19 or r_ _ displayed in the top LCD all the time (when the camera is ON) or just when you press the shutter release button half way?
What happens when you mount the MB-D200? Good Luck and Enjoy your Nikons!