If you are using the 18" non hi def dish I think you also have to remove the filters (small black rectangular) from the line.
i have set up my own directv system since i start subscribing in 1999, with the exception of the latest hi def, so it really isn' that hard. Dish just doesn't have some of the channels I like.
Goody Two Shoes and the Filthy Beast
2008 Chevy Silverado 2500HD
Duramax and Allison 6 speed
2012 Wildcat 282RKX
You can't make things idiot proof, you can only make them idiot resistant.