I would velcro the PW to the top of the flash and connect it to the PC sync. It would not do it all of the time which made it real hard to figure out what was going on. I use a custom bracket and a customized OC3 cord that has a mini plug coming out of the base so I can orient the PW vertically and that seems to have fixed the problem. I also bought a threaded PC sync cable and used it sometimes when I don't feel like using the bracket. It works well too. I think it was a combination of interference and a poor pc sync connection ( which is why I got the threaded one).