V6 pairing will not fire nikon SB-600
Hi, I have just bought 3 cactus V6s and I can not get them to fire my SB-600 flashes at all. I have followed all the instructions, and the problem shooting guide, I have set the flash profile, set the channels and tried different ones, changed the batteries, and tried the short working range. The flash fires when I press the test button on the V6 receiver that it is connected to, and when I change the power output on the transmitter it also changes on the receiver showing that they are connected, but when I press the test button on the transmitter no flash. The Led on both goes orange when I half press the test button, and the Led on the transmitter goes green when I fully press it, but no green on the receiver.
Can you help? I bought them yesterday and they are going back tomorrow if I can't get this working!