Hello everyone: my name is Maurizio and I'm Italian. This is my first post here although I registered years ago. I'm writing because I have a problem with a flash on my Leica M9, which I can not solve. I have a nikon SB-900 flash that works in manual regularly on the M9. Now I have bought a Debao SU-800 remote commander but the signal does not reach the flash. (Debao work normally with my nikon camera). (I know it's shameful to apply a Debao in a leica m9). Naturally I set the same "communication channel" and "group name" in commander and remote flash. When I shoot the remote flash does not turn on One more thing: When the test lamp, in the SU-800, is red, I press the test button, and the flash turns on but after a couple of seconds. Can someone help me solve this problem? Thank you very much for helping. (I apologize for my bad english)