I can't really add much to what has been said.Maybe try this it has worked for me several times.Wait for a few minutes before you start to call again and then SLOWLY turn your head and throw your calls behind you.Try to sound like an excited hen but do it at half the volume you were before to try to sound like you have moved away from him about 100-150 yards.It will work about 75% of the time.It just seems to drive them crazy knowing that the hot hen they just heard a few minutes ago has walked away.He will either come on in or walk away depending on his dominance in the area.Hope it works for you.