According to the Data Base, Pax Riv. operates a Motorola Type II system. I have a Radio Shack Pro 95, programmed for the Frequencies, Offset, Base, and Spacing per the RR Data Base.but cannot hear a thing, even with the radio in Open mode. I am about 3 miles line of sight from the base which seems within reasonable range. Any suggestions on what I'm not doing correctly to receive this system would be appreciated.