It would not set the wireless function correctly if it was not pushing home. I have tried to replicate the problem with my 5600 HS (D) - identical in functions - and can't, so I assume something is wrong. One last thing - have you made sure the camera is set to P, A, S or M? In the Green Auto mode, and any of the other modes, the flash will only fire if the exposure requires it. In any normal daylight room interior, chances are it will simply not fire because the auto-fire tells it that it is not needed. This definitely happens if you have the camera set to the Green Auto setting, and the flash mounted on the camera.