I have lost the ability to Liston on my bearcat BCD996XT to the fire grounds and privet channels for fire. for Shiawassee County. I can hear the old dispatch channel. I believe they change Frequency on the 800MHz radio. i found were to input the new Frequency put their are 4 locations and I need to know the new Frequency and which order and which spot to put them in to get me back up and running. can any one help?