Reenabling MoCA

Comcast recently advised me that I needed to upgrade to their latest gateway. My previously gateway (a 2nd Gen) was whitelisted so that I could use an ActionTec MoCA device to get a wired internet connection in my basement and it worked flawlessly for years. The new equipment arrived yesterday which I set it up and enabled MoCA in the admin controls, but I don't get a connection from the ActionTec now. Does the new gateway need to be whitelisted?