MOCA Problem

I just bought a Roamio Pro and want to enable MOCA so I can use a mini in my bedroom. I have a ARRIS TG6862G/CT router from Comcast. I have split my coaxial cable with a RadioShack splitter that can accommodate up to 3 ghz. The coaxial cables from the wall go into my Roamio and my router and an Ethernet cord connects my Roamio to the router.



When I try to change network connections to enable MOCA I get Error C33. It says "There is a problem with your network settings. The DVR was unable to connect to your MoCA network."



Does anyone have any suggestions for someone with modest technological abilities but great love of Tivo?



Thank you!