I am an old salt HAM operator, but a newbie on GMRS. I am trying to program my radios and I have all the correct frequencies and Tones for the repeaters in my area, however I can hear then talking but I can't talk to anyone. I am programming the offset to 5k +/- also. I tried Low Power 1 watt and High Power 8w and I get the same results. Can anyone assist?