I bought a pair of speedlights, the SB-800 and SB-600, for my Coolpix 8800 camera. The SB-800, attached to the camera hotshoe, should act as a master to the SB-600, sitting off camera. If the SB-800 is not connected to the hotshoe, I can select the menu that sets the 800 as master, and when it flashes, the slave 600 flashes. But as soon as I attach the SB-800 to the 8800 hotshoe, the menu choice to set it as master vanishes. I can't discover any flash or camera mode that enables me to set the SB-800 as master once it is in the hotshoe. Bummer. Otherwise the SB-800 operates fully automatically as it should. Any suggestions about how I can use the pair of speedlights as master and slave?