Has anyone used the Pocketwizzard plus IIIe with an A9 to remotely fire the camera ? I have tried but something is wrong, its not firing all the time. Some times it will fire the shutter once or twice. Other times it will fire every time for 30 Minutes or more and then just stop working. I have tried both on and of the hot shoe with the same results. My thoughts are it could be the cable at fault. Can anyone recommend a cable or anything else i can try please ? Colin.