Hi everyone, im having problems with my Nissin Di622 Mark II for Canon 5D Mark II. It does not seem compatible, the flash will become immobile after 1 shot. Is there a problem with the firmware on either the Flash or the camera body, could you advise me? On Nissin's official website, the Di622 Mark II is said to be compatible with a Canon 5D Mark II. Thank you for your insights(=