+ AA6YQ comments below

CW Skimmer showed my frequency and interacted with the transceiver literally for years, but the frequency has not appeared in the past few months, and I don’t know how to fix it.

+ Have you asked the developer off "CW Skimmer"? He's in the best position to know what might prevent it from displaying your transceiver frequency when everything else is working correctly.

    73,

           Dave, AA6YQ