Hello,
Have you tried installed on Ubuntu ? Because I’ve an experience where on windows environment I’ve wrongly changed PID for MC7304 which causes that module was not recognized by windows. I managed to resolve this issue by install on Ubuntu where we could see this module inside “lsusb” and “/etc/ttyUSB2”. In windows environment, if “DM” port was listed inside Windows Device Manager, by right you could access that module for “AT” commands. Could you list down any other devices for that module inside Windows Device Manager for these items (Modem, Network, Ports, USB).