Hbo max thru Hulu subscription on x1

I have a subscription to hbo max through my hulu subscription,which I pay directly to hulu. I can watch hbo programming within hulu on my phone and computer, but not when accessing hulu through my x1 box. Its weird because it worked fine at first, I watched a few episodes of Rome last night, but the next time I went to hulu on the x1 box everything hbo was gone. I've logged in and out of hulu on the box, reset the box, but still nothing hbo within hulu. Other programming in hulu works fine. And as I said, I can watch hbo programming within the hulu app on my phone and computer.