My Nissin Di622 Mark II accepts wireless signal from the 60D and fires reliably. However, it only happens when the camera internal flash opens and fires. If the internal flash is down, the Nissin stays off.
I checked the setting for the external flash. If the Nissin is mounted on the camera, I can make changes. If the Nissin is off the camera, the camera menu says that no external flash is available.
I had the same result with the Canon 450D (XSi). Is it a normal behavior, or is it the flash fault? If the latter, I will be disappointed, as I do not want the built-in flash to work.

