A similar situation happens with the Microtouch focuser: Ekos displays the message 2019-06-02T15:54:14 ASCOM MicroTouchServer Focuser1 is disconnected.
It works flawlessly under WIndows 10 with the same ASCOM driver from Sequence Generator Pro. It also works with Ekos under linux.
Please find the log attached.
I'd really like this setup (Orion SSAG, Microtouch focuser) to work from Windows, since it is my main operating system from this machine. The CEM60 mount and the ZWO 071 Pro work without issues from windows.