[Elecraft] K3S Initial setup calibration problem

[Tom Norris]

Newly assembled working great so far.
At the Owners Manual Calibration Procedures pg 52 (Fred Cady book Elecraft
K3S and P3 referred me to Owners Manual for some Calibrations after going
through Configuring the K3S pg 26...)
Wattmeter:
Both CONFIG:TUN PWR and PWR SET to NOR (KPA3A not installed yet, all covers
on.
Low-Power (5 W) W mtr calibration
On 20 meter band at 14.050
On a 1kw Cantenna 50 ohm dummy load (ch'd w/ Ohm meter)
Set power to 5.0 watts on K3S with Pwr knob
Go to CONFIG WMTR LP showing
Press TUNE (hear signal on Omni D) but does not register on ext W Mtr and
cannot vary output with VFO A knob (which is the instructed 'Parameter'
adjustment knob I assume?)
Ext W Mtr is working ok with Omni D output

I must be missing something? Setting?
Thanks, Tom NB5Q