I was hoping somebody could clear up some issues for me.

I just got 2 YN460's today, plugged them into the v4 receivers and away I went.

Only problem was, only one of them was firing consistently. The closest seem to be the one firing all the time, and the other wasn't firing at all. Turn off the one that is firing and the other one shoots constantly.

I've got both the flashes on M, and the channels are the same all through the receivers and sender.

Any ideas what the cause could be?