Win 11 won't connect to mount in Stellarium

[debherbie1]

I have 2 different PCs running Windows 11 pro. a Lenovo Laptop and a Mele quieter 3c.  On both systems I cannot connect to my RST135 mount .
Running ASCOM  AscomPlatform661.3673
I setup the TELESCOPE CONTROL for ASCOM but when I try to connect to my RST135 ASCOM mount  it displays CONNECTING  .. and never completes.
Tried Stellarium  v   0.21.3,  0.22.1,  1.1.1
Tried running Stellarium in WIN 8 compatibility mode. no luck.

I can run APT or Sharpcap on the same WIN 11 pro PCs and they connect to mount  with no issue.

If I run same version of Stellarium on my windows 10 pro laptop, it connects to the ASCOM mount right away.
Any ideas on what to tweak in Win 11?

[malc-c]

I don't own the mount in question, and as it works fine in other applications this does seem to be a Stellarium issue rather than a hardware issue, be that the mount or the cable.  It also means that communications settings such as com port speed are not the issue as the other apps connect and function correctly.  Maybe try a different planetarium application such as Cartes du Ciel which may resolve the issue for now whilst the issue with Stallerium is worked out.