I splashed out and bought a Metz 54-MZ4 to use with my Rolleiflex FX - anxious to see how well the film plane flash metering works. I picked up a used SCA-356 on Ebay. However, when I place the flash onto the SCA-356, I cannot get the flash to fire - attaching the SCA-356 to the hot shoe on the camera and firing the shutter does not cause the flash to discharge, nor does pushing the discharge button on the flash unit. I tried the flash on a SCA-3XX Nikon unit and it works perfectly and will fire when mounted on the unit and the flash dicharge button is pressed. Am I correct in assuming that the SCA-356 unit I have bought is faulty? Or am I missing something here?