My current boat has an M802 SSB radio. I have some SSB experience, but I've not used this particular radio before. I usually get along quite well with electronics and computers, but the M802 is challenging me. I didn't find Southbound II VAX498 anywhere in the user channels so my goal is to add 12359.0 to an empty user channel memory location. I'm following the frequency programming instructions...Enter the memory channel number and press enter. The blank channel appears as it is supposed to, but the next step is to press the [RX clar] button and then enter the frequency. However when I press [RX clar] I don't get the > appearing in the display and the radio doesn't allow me to enter the frequency, instead it just beeps when I press a number key. What am I doing wrong? Can the capability to program user channels be locked out somehow?