Solved Mouse Without Borders Fail

I have used this for years on two adjacent desktop Win 11 computers. Today I installed a new hard drive and installed Windows 11 and ran all the updates. I have never had any trouble installing and using MWOB, but this time it will not work even though the setup shows being connected. Each machine is discoverable on my home network, so everything appears to be in place, but I cannot move the cursor between screens. Any ideas?

Never mind. I seem to have figured out the problem... me.

Nothing like those PEBKAC moments.

Was it a simple settings fix, or more involved?

Had similar experience not long ago. You have to run the same version of MWB. I've tested one from Power Toys, and one from MWB site(older version).. no go

I think my main problem was that I had the device alignment wrong, so the access was from the opposite side of the monitor that I was expecting. Otherwise, just repeat the setup process if you are having problems. It usually works first time, every time, but somehow I got messed up this time.