Can't watch LIVE TV on PLEX Server, or PLEX app! AppleTV doesn't show anything about LIVE or DVR!

Hello everyone, I could really use some help…

I set up my new HomerunHD Connect and have 3 Apple TV’s in the house. I’m running PLEX Server from my MAC for now, and have been for about a year until I can afford a QNAP.

I followed the setup instructions on my MAC and PLEX scanned the channels and downloaded the schedule perfectly and everything displays perfectly. When I open PLEX on my MAC, the Program Guide and Schedule now appear in left menu, however, there is no option to watch live tv, it only gives me a RECORD button, which I haven’t yet tried.

When I open the PLEX app on each of my three AppleTV’s, there is NOTHING anywhere on the screen that shows anything about Live TV, PLEX DVR, or even any of the HD channels that I can access with the HomerunHD Connect. There is no option for Live TV or PLEX DVR or anything similar on my Apple TV. What am I missing?

Again, I’m using a Silicon Dust HomerunHD Connect and Apple TV. I should mention that I can watch all channels perfectly fine with a third party app [‘Channels’ from the App Store] on my Apple TV but I would much prefer to use Plex. AM I missing something or have I done something wrong in the setup? Am I simply overlooking something on PLEX?

Please, your help, thoughts, and/or Ideas will be greatly appreciated.