The MOXF is connected via USB and works perfectly on the Gaming PC with Pianoteq - yet can't get it to see it on the Microserver

Both PCs are running Windows 10 Pro

Both have Yamaha Steinberg USB drivers installed

I've even (this morning) performed a complete fresh re-install of Windows 10 Pro on the HP machine plus Yamaha drivers yet still can't get any midi to work

on the PC that midi is not working on:

USB Asio audio to the MOXF Yamaha is working (!!!) - I can play back the Pianoteq midi player out to the MOXF and then out of the line-outs of the MOXF
Windows 10 device manager shows 10 ish Midi ports (all say connected to MOXF6)

yet when I select "Listen to All" I'm getting no midi input whatsoever

I tried downloading Midi-OX to fault find and it says no midi ports found

it can't be a keyboard setting as if I move it to the other room- and plug it into the other PC it works straight away

any ideas please ?