Problems getting VarAC to work with SmartSDR

I have been having problems getting VarAC working with my FLex
Radio 8400. I am using Windows 11, SmartSDR v3.8.23, VarAC V11.2.0, and
VARA HF v4.8.9.

It starts-up with no errors. The CAT feature to change frequencies on the radio works.
The "test" buttons in the VarAC and VARA HF settings dialogs generate no errors. The VARA HF test "keys" the radio (transmits).

When I hit the "Send Beacons" button, VarAC reports that a beacon was
transmitted, but nothing happens in SmartSDR. The "Tune" button is also
always dimmed.

I checked the logs generated by both VARA HF and VarAC. No errors are generated. It indicates that a Beacon was sent (but it wasn't).

I have DAX enabled.

The VARA HF window some times disappears and then reappears -- I assume it is dying and being restarted ?

I uninstalled VARA HF and VarAC and reinstalled. I have run as administrator.

I thought my router could be causing problems, so I connected an
ethernet cable directly between the radio and the computer. That did
not help.

SmartSDR works fine with WSJT-X and fldigi.

I have attached some pictures of the setup windows, CAT and DAX windows, etc.
Click on the first image to see a "slide show". Sorry this website will not allow me to post pictures directly because I have not yet posted enough times...

What am I doing wrong ?

https://www.icloud.com/sharedalbum/#B1tGY8gBYGXV1sT