hey guys, I have a yongnuo 468ii that i use with my canon 5diii. I tried mounting on my Epl5 but it's not working. I understand that there will be no ttl but it's not even flashing. Do I have to do anything in the setting menu? The OEM flash that came with the camera mounts on the hotshoe as well as the accessory port. Is that the reason why my yongnuo is not working?