I bought a c mount adapter from Rainbow imaging. When I attach the adapter to the camera, either with the lens mounted or not, I am getting the message "lens not attached properly, do not push lens release button while lens is attached". I have the "shooting without lens" menu option in on position. The lens is mounting on the adapter without any problem. I repeat that I am getting this message with the lens on the adapter and without the lens on the adapter. I have a Panasonic G2. I am using it with 14-42mm kit lens without any trouble.I am on M, S, A, P modes and not iA mode. What do you think is the problem? Can anyone help me? ThanQ.