I tried to connect my satellite catv wire to my digital receiver and then I connected the digital receiver to video-in socket in my card. And I was able to view only one channel (selected channel in digital receiver).

But that’s not what I want. I want to be able to change channels though my computer.
I know this option is available in my card, that’s way I bought it.
In other words it should be separated from my digital receiver.
Anyway, thanks very much for your help