BBB usb gadget doesn't work with latest debian image on windows 7


Hi All,
I have a new BBB rev c. board.
The image stamp is:

Debian GNU/Linux 7 beaglebone ttyO0 Debian Image 2015-11-12

withi this version , i can work with the usb gadget, it creates a virtual com port and i can interact with the board with TerraTerm.
But, when upgrading to latest image (i flashed it into sd-card, and boot the board from sd-card).
Windows can’t recognize the CDC Serial device (which is marked as unknown) and then the usb gadget doesn’t work (it does create a virtual com port, but it just don’t do anything… )

the image stamp is:
Debian GNU/Linux 9 beaglebone ttyS0 Debian Image 2017-08-31

can anyone know how to resolve this?


So this just gets ignored?