[Elecraft] [K2] Rig Control Error

[Jim KO5V]

I have similar problems with my Win7 64 bit machines. It's tough to configure any additional COM ports, everything seems to eventually default to COM 3, and I can't make any changes "stick". Using only one "COM port"device, Sometimes just unplugging, and re-plugging that device, or stopping and restarting the desired program will make the computer see the connected device; sometimes,not. 

I asked my brother-in-law, a Windows systems guy, what he would do, and his reply was that he basically does what I've been doing, but then explained about some "advanced stuff" that he would help me with, but that I shouldn't try them myself...

Make sure there's nothing else using the COM port, and see if the program will work (if you haven't already done that).

Good Luck. 73, Jim KO5V