said by webcobbler :
It is on the Guide now, as well a Guide Data in VHO 7. However, when I tune to it, it says that I am not Subscribed to Cartoon Network, and Press OK to Subscribe. And when I am on ch. 257, there is no "Press C to Watch in HD" option.
Maybe it will up and running on Friday, if this is any indication of the channel's progress. Just my opinion.
Try restarting your STB. If that doesn't work, try an autocorrection.