I just got my add-on hotshoe for my NEX 5N, that goes into the accessory port and is screwed in (neat little screw and screwdrivers are included). My SB-600 mounts on and locks in just fine, except then the flash is not fired ny the camera (everything in manual mode, which worked like a charm with everything I ever tried it on, including the tiny Oly ZX-1). Any idea as to why it doesn't work ?? Thanks a lot.