I noticed that when I am controlling a position in a vehicle, other AI controlled positions don't always work. For instance, I was using the Bradly as the driver. However, I couldn't find any way to get my gunner to fire his weapon. When I switched to the gunner's position, he wouldn't drive. Even when I give the whole group orders to attack a specific target or move to a location, all fully AI controlled vehicles respond except him. What orders should I give to fix this?