Hauppauge Quad HD No Reception

Hi,
I have a linux Plex Server (Debian). I purchased the quad HD tuner and upgraded to the latest stable version and now can detect the card in plex but whenever I scan I find no channels. I plug the same cord into my tv and it works just fine. Is there something i’m missing in plex to make the live tv work?

Thanks!

I had the same problem when I plugged my card into my desktop pc (Ubuntu). I spent hours trying to get me-tv or PMS to find any channel during a scan. I spent more hours installing Windows dual-boot and the Hauppauge WinTV program. It couldn’t find anything either. Then I plugged the card into my RAID server (Arch Linux) and Plex detected it and found a bunch of channels same antenna.