I am having much difficulties syncing a strobe to my SL. My strobe is an AB400 with wireless T and R Buff Cybersync. My SL is a YN 565EXII connected with a cable to YN 622C, T and R.
Welcom to TPF. I am not familiar with the Yongnuo or Alien Bees flash equipment you have listed, so sorry I can't help. When I'm having problems with flash / strobe units, I make sure all the batteries are fresh / charged, that each unit works as expected on it's own, my cables are good, and the settings on my flash / strobe units are correct, i.e., ttl, slave, master, ... , then I start with one flash unit at a time adding until I've got the setup I want. Good luck!
Welcome aboard FlyGirl , Please tell me if my assumptions are correct. You placed a YN 622C Transmitter in your hot shoe and then you place a speedlite YN 565 EX on another YN 622 as a receiver? And you need to sync your AB400 with the Yongnou's Is that correct? I think simplest way to sync you AB400 studio strobe to your Yongnou would be to set you AB400 to optical slave mode. I don't think the BuFF Cybersync Transmitter and Receiver is compatible with your Yongnou.
Girl, Welcome! I don't know much about what you have BUT since the Buff stuff is not gonna pair with the Yongnuo it seems to me you could do it this way. Put the Yongnuo(Yn) trigger on the camera and the Yn reciever on the SL. the camera should then fire the SL! Then put the 400 on slave mode and optical trigger, the SL should optically fire the 400. Most SL can't be fired optically but most strobes can be, or at least that's my experience. Good luck SS