I got my Metz 52 AF-1 today which I wanted to use to trigger my Metz 15 MS-1. Now the question is why is the 52 AF-1 firing when used as a master flash CTRL power set to '----'? Because it shouldn't fire in that case, right? Or am I doing something wrong? (I use the CTRL+-TTL-mode with ratio set to 1 for RMT and RMT2 and ---- for CTRL) Any ideas what's wrong?