Help with DVI connections onSamsung HL-P5063 and Samsung SIR-TS360??

I have a SIR-TS360 DirecTV receiver and a Samsung HL-P5063W DLP TV. I have recently connected the 2 with a DVI-D cable (both are DVI-D) and am having problems with getting any signal on certain resolutions. If I am watching a NON Digital or HD channel (Native 480i/480p, almost all DirecTV channels) I get a picture using DVI. For all other channels (local DIGITAL from off air antenna, and DirecTV HD channels) I get NO PICTURE whatsoever. I figured this was a configuration issue, not a cable issue as I can get pictures in the lower resolution. I had my receiver set up for Native 1 (as to display all programming in it's intended resolution) and had the correct output set on my receiver and correct input on my TV. Does anyone have any suggestions? Thanks in advance.