MoCa network seems connected - but no

Just connected a 6-tuner Roamio to a mini with coax, and on the Roamio network status it says "Ethernet + MoCa" and in the "MoCa details", it says the network is "up" and I have 2 nodes. When I unplug the mini, the network is "down" and 0 nodes. So, there's something between them. But I can't get through the mini guided setup. Either an N02 or an N07 error - basically router not found. I work in a Corporate environment, and the IT staff is supernaturally unhelpful in every way. So, hopefully I won't have to mess with the router or anything like that - any thoughts?



I'm using a MoCa setup because IT gave me one IP address for the TiVo and I was lucky to get that - so Ethernet Internet connection is pretty much not possible for anything but the Roamio itself.