Had one that came with my boat never could hear anyone thought antenna was bad. Spent 90 on a new one. Still nothing. Bought a new one from west marine. Tells me to add the mms number??? I can hit weather and hear everything fine. Can get 3 or so channels. Unplug antenna then nothing. So antenna works. It has 1ks and think 12 khs tried both still cant hear other boats. Whats am i doing wrong?? Never soldered wire to pin on antenna. Could that be it?