Re-wiring a Dish Network install

Improvolone

My dad wants his TV moved from the family room to his den. I crawled into the attic, found the Dish junction box, and by way of unplugging to see if the picture was lot, determined that line 2 fed the family room. Luckily I didn't have to run any wire because his den has an unused coax hanging in the wall behind an unused plate. I tracked that wire through the ceiling, through the insulation, over the air ducts, through the beams, and across the studs, to its end. Lucky me again, I didn't even have to cut it, I just had to toss a connector on it and crimp it tight.
So I plugged the den coax into port 2 of the Dish junction box, hauled the TV over, hooked it up, and the damn thing hung up on "Searching for Satellite".
Clearly something went wrong, but I can't think where. I'm certain I followed the correct cable through the attic the whole time, but I'll double check tonight once its cooler. I'm certain my connections are strong, there is certainly enough wire coming out of the top of the coax connector to insure a connection.
Maybe there is something specific to Dish installations that I'm missing. Can anyone give me some insight?
The coax hanging in the den has been unused since the house was built a couple years ago, and the odds of a bum cable are slim to nill, right? Is there any way to test if the cable works (or if I even have the right one) by putting a charge through it (how) and testing the other end with a voltmeter?

Rendon

An easy way to test if you have the correct cable is the use a multimeter. Put the meter on resistance and the bend a paper clip so that you can short the center pin to the connector nut. Meter on one end, and paper clip on the other.

SiliconStew

That would tell you if the cable was cut or wrong cable, but it won't show if the dielectric (between conductor and shield) is damaged. Coax depends on the dielectric to be as uniform as possible for the entire length of the run for best signal. This is doubly important for antenna cables.