[Elecraft] K3 ATU Question

[Ed G]

Hi Folks,
     Maybe I'm missing something very basic (or maybe still in a SS fog),
but when I try to use my internal K3 antenna tuner, the display says "no
ATU."  I can go into the config menu and set the tuner to AUTO, and I see
"ATU" on the display, but when I go to actually use the tuner, I
can't...display says no ATU.
     I should say I ordered the K3 with the internal tuner, but until this
point haven't tried to use it - I'm assuming it's actually installed ;)  I
do have the second ANT 2 SO-239 on the rear.
--Ed--