On my Nikon d80:

The "fEE" error indicates that the camera is not communicating with the lens. The lens may not be attached to the camera properly, or if it has an aperture ring, it may not be set to f22 (or the highest aperture number of the lens) - which is normally marked in orange. Select this aperture and lock it using the aperture locking switch to prevent this from occuring again.

Clean the contacts of the lens with alcohol or sprit. (I also had same problem)