Unable to watch MLB.TV

I can log into my Mac, my iPad, my iPhone and watch the Cubs vs the Cardinals right now. But the ONE PLACE I WOULD LIKE TO REALLY WATCH IT is on my 46" HDTV, which would mean I need to access the game via my AppleTV.

It only shows 'audio only', and is apparently blacked out to AppleTV users of their MLB.TV subscription.

Huh?!?!