[Elecraft] KAT500 Utility

[K8RS]

Group,
           How do you access the KAT500 Utility?  I do not see a COM port that is connected to the KAT500.  If I have the K3, the P3, the KPA500 and the KAT500 all connected together with the proper cabling and everything is working fine, where does the KAT500 Utility get its COM port? I have tried connecting the PC data cable up, but no COM shows that the Utility recognizes.  What’s the secret here?  I’m missing something and there are no directions in the manual that helps.
                                                                                                                     Roger K8RS K3 S/N 280