Lost communications with mount
I am doing table-top testing of our Mach2 (before we can put it on a proper tripod). I use TheSky6 in a Windows 7 virtual machine on my Mac. GTOCPS5 is connected to the computer with a short USB2.0 cable and converted to USB-C to the Mac. Under TheSky6, I connect to Mach2 with ASCOM V2 Driver. The ASCOM driver sometimes connects to Mach2 by itself, sometimes through a virtual port under APCC Pro. Either way, the behavior doesn't change. Using different cables doesn't solve the problem either.
What I do is just do a very small slew near north pole under TheSky, and let the mount track. Almost always, within just a few minutes, TheSky shows an error message saying "Lost communications with mount." At almost the same time, the mount makes a very tiny sound, which sounds like it parks itself. I suppose this is not something I want to see during a real observation/imaging session.
This is my first time using an Astro-Physics mount. So I may have done something wrong. Please let me know what I can do to solve this, or what I can provide for diagnosis.