[Elecraft] Can't get KAT500 Utility to connect to COM port

[Roger]

What am I missing?  

I started to upgrade the firmware for my K3/P3/KAT500/KPA500 station, but I cannot go forward  because I cannot get the KAT500 Utility nor the KPA500 Utility to connect to my computer’s COM 3. The K3 and P3 Utilities recognize COM 3 instantly. 

I have recycled the turn on sequence to different pattern's. The cable between the KAT500 and the computer is the OEM cable and is plugged into the computer’s USB port. I have had things working together before .  I have a double 15 Y connector on the input of the K3 ACC port.  What am I missing?  What’s happening?

Need some help here!

Roger K8RS   K3 S/N 280