flaky wireless trigger when tethered

My Yongnuo wireless transmitter doesn't seem to be consistently triggering my 40D (which is tethered to a laptop). When I press the shutter release button on the transmitter I see the red LED illuminate on the receiver, but sometimes it doesn't trigger an exposure. I'm only shooting 5 feet between transmitter and receiver.

Even when I press the shutter release button on the actual receiver, I still don't get an exposure every time.

All in all, it seems to work only about 50% of the time. Once I get it going I can take a nice series of shots. But if I stop for a few minutes it once again can't seem to get going.

Sometimes unplugging it from the body and putting it back in works, sometimes not.

Anyone else experience this? I never used to have a problem with this remote trigger system.

Could it be because I'm tethered?

try unplugging the tether and see, other then that it may be your Yongnuo

FJ LOVE wrote in post #12456913
try unplugging the tether and see, other then that it may be your Yongnuo

Last night I first tried it without the tether. Fired off dozens of shots no problem. Then I tethered and again fired off a dozen shots no problem.

It may be the cybersync transmitter that I am using for my 3 monolight setup. Unfortunately I disconnected everything and took my whole setup down because I'm going to be moving soon so I can't continue troubleshooting the problem.