I have two Motorola XPR 8400 set up in a repeater system running in digital mode. one of them is the main repeater the other is being used as a satellite receiver. they are connected via IP thru a Motorola canopy system. This system has been functioning well over the last 4 to 5 years, but here in the last month or so the remote receiver seems to be having a reception issue. if I program the satellite receiver in regular repeater mode it receives well but if I set it back to receiver mode it seems to have a problem seeing a radio key up. I have also switched it to another antenna from another repeater that is setup in the area and nothing changes. I have tried to connect the Motorola RDAC software thru a remote connection but have been unsuccessful but I can connect to a switch and ping the IPs of both the remote and the main repeaters using a PC. What am I missing in trying to get the system functioning properly again?