How do I connect my computer to my dishnetwork receiver?

I Have an XPSM1210 with Windows XP Media Edition, and I am trying to connect my dishnetwork receiver to it so that I could record shows that I miss, the only jacks on my system are TV Out, Mic in and 2 headphones in, plus a fire wire jack, how do I go about it.|||I believe you'll need a dedicated receiver to accomplish that. Check with the dish network.