A couple of things to check.
1) It looks to me like you have a Slimline3 SWM LNB dish. It's definitely a 3 LNB dish not a 5. I say SWM because it looks like only 1 wire comes out of the LNB.
2) If it is a SWM LNB, then it has a built in SWM multiswitch (built into the head, you can't see it). Your SWM multiswitch needs a 29v power supply. If you don't have it, you won't get signal. If your dish ever worked, then at some point you had a power supply. It would look like this:
http://www.solidsignal.com/pview.as...M16-(PI29Z)&c=Multiswitch Power Supplies&sku=
If you can't find it, you can buy that one for $12.
3) Your D12 box is compatible with a Slimline 3 LNB SWM. Go to repeat satellite setup and make sure its set on the right dish AND that it is set on SWM not multiswitch. It will tell you if it can detect the SWM or not. It won't detect it if the SWM isn't powered.
4) Just a note, your box will get signal (like when you "view signal strength") even if your card is out of service. You won't be able to view programming, but you can see the satellites.
5) That one "head" you see has 3 LNBs in it. The Slimline 5 has 3 "heads" 1 contains 3 and the other 2 contain 1 each.
6) If you get tired of messing with it the Tailgate Co. still has spots available for all remaining home games haha
Post back here and let us know how its coming.