No RF Output using WSJT-X to Smart SDR

SmartSDR, DAX and CAT v3.4.21, Windows 10

I'm thinking that after all the back and forth between user guides, forums and videos I would have a good chance of getting SSDR and WSJT X setup correctly. Not quite !! Basically, WSJT-X keys SSDR but RF Power output is zero. Hope someone can spot a detail I have overlooked.  

There are no issues with WSJT SSDR receive. 

Pressing the WSJT TUNE button turns red, a carrier appears on the SSDR Panadapter Display but no RF Power indicated on the RF Power Panel meter

Pressing the SSDR TUNE button turns blue, a carrier appears on the SSDR Panadapter Display and RF Power and SWR will display on the RF Power Panel meter.

RX and TX DAX are enabled and streaming as indicated by the DAX Control Panel.

WSJTX Radio, Audio and Device Manager panels shown for reference.

Thanks

Ron n6paa