Hi, I read this thread, which sounds close to the same setup as I have.The writer received the same error message as I just did when trying to log into the TWC app on my Roku 3: "The program you have requested is only available when you are accessing this video service in your home, using a cable modem authorized by Time Warner Cable"
The writer was advised to have TWC install (at no charge) a TWC gateway modem (no mention of whether there's then a monthly charge for the modem, post-installation).
My setup: I have a Tivo with an M-card installed, that's how I get my TWC cable service. I have DSL Internet from my phone provider. My Roku 3 is connected via WiFi.
So -- gateway installation for me, too? And will TWC charge rent on it, once it's installed? (And if the latter is true -- can I have my own gateway modem installed, as I recently did at my mom's house? She has Roadrunner as her ISP. I used a TWC-approved Motorola, and we returned her TWC modem, for which she was being charged a montly fee.)