So im having a soecifice problem on a dover dmc 1 -4 stop hydro with 1 front landing and 3 rear landings. So car runs to all floors and and opens doors but it will not latch a hall call. I can see the Input signal on my FASt screen and there is 24vdc on the terminal strip but when i press a hall call but it does not latch? Any ideas? Theres no lockout switch either and all parameters are good, like i said if i get in the car i can got to any floor no problem. Thanks in advance