[Elecraft] K3 KPA3 not working(?)

[John H Gibson]

I am trying to put my new K3/100 SN 820 on the air for the first time, and I am 
having a power output problem. The KPA3 is installed, I hope correctly, but I 
cannot adjust the output power above 12 watts. The radio behaves as if the KPA3 
was not installed.

I do have CONFIG: PAIO set to NOR. (What does the TEST setting do?)

Can anyone suggest what I may have overlooked or done wrong?

Thank you.

73,
John, no8v