Yongnuo ST-E2 Transmitter Sync Issues

Hi there,

I just bought a Yongnuo ST-E2 transmitter. I'm running it on a Canon 1D-X with a 580EX II Speedlite and a 320EX.

I'm running them both on CH1. Both speedlites are on Group A.

Everything seems hooked up fine. both flashes appear to fire and both work the modelling light function fine.

But the pics don't show any flash - so syncing is not working.

Any clues?

--
Gaz
(Melbourne, Australia)
Website: http://www.vitamirus.me
Blog: http://vitamirus.blogspot.com