Anyone familiar with the Metz 50 AF-1 flash? I purchased it from a fellow here on the forum a short while ago and tried using it for the 1st time and I've noticed it's stuck in M mode despite having tried everything! I've downloaded the manual and have read it completely and it just doesn't appear to be functioning correctly- anyone know what I can do? I tested it when it arrived and the flash seemed to work fine for the few test shots I tried with it...........then put it away and tried using it today for the 1st real series of modeling photos and no luck at all~ I'm bummed out as I lost the evening's shots (and model's time) and this flash seems to be a dud! Hope you guys can suggest something.......can it be reset?