Lyle, Exactly what were you doing when you crashed? Were you in calibrate & registering three points (if so did it crash right-away or did it crash after you registered the third point)? You also mentioned using another coordinate system. Have you successfully calibrated other maps with this coordinate system? Also, what is the coordinate system? If it's State Plane or UTM, what zone are you in?
If you can answer these questions for me, I will do my best to find out why you are crashing.