Hi Teri With my Roku TV we activated VHX.TV -- they presented a login number, then I ran back to my computer (guess you would run to your phone) to verify. Our whole house is networked so your phone should be using the same network as your TV to get it locked in. It took about a week to figure it out. I don't cast the videos, but go to the VHX app on my ROKU TV and am automatically logged in. Yes, we love Jenn and the Groove, too!