I have two remotes for two doors so that each remote could open either door. Recently, no matter which remote I used they would not open one of the doors but would open the other one. So no problem with the battery or sending the signal to one door and getting the desired response. Both doors can be opened by using the wired remotes. This unit uses dip switches and they have not been altered since before when both remotes would open both doors. Any ideas other than replacement.