I am trying to use an HD4 MAX MBX of FirstNet and i also want to use an Assured Wireless AW12 as a 5th WAN via the USB. I cannot get the AW12 to connect to the network. It works if I plug it directly into a laptop. Am i missing a setting in the HD4? I did notice that the USB is only a LTE and not LTEA if that makes a difference.