USB print server does not connect to Cisco DPC3941T (Xfinity) modem

I an trying to use a IOGear GPSU21 USB print server to connect the HP psc 1350 USB printer to the Cisco DPC3941T (Xfinity) modem via ethernet cable. The goal is to share my printer over the WiFI network so that all other PCs/devices on WiFi can use the same printer. After installing the PSWizard software (from IOGear) on my Window 10 pc (this SW will configure the network print port), I am having problem, I cannot see the printer on network. When I go to Xfinity gateway portal, I looked at "Connected devices" and also do not see the new print server in the list of connected devices (with connection "Ethernet").

Is there something I need to configure in Gateway settings? Is it possible to use a USB print server with the hardware mentioned above? Other suggestions on how to make this work? Thanks