I tried to give a Dish receiver to a friend, but when he called them to activate it, they told him it was "leased equipment" and they couldn't do anything with it. It had initially been "leased" from them, but I haven't used it for years (I also have been charged the lease fee). It's been in my basement for so long and I just want to get rid of it. They have told me multiple times that they would send me a box, but they never do...
Anyway, in my case, it appears that the thing is worthless, and no one else can use it for some goofy reason. I know that you're working with DirecTV and I'm working with Dish, but I just wanted to comment on how at least part of that industry seems to operate so that you're no one's disappointed if the receiver doesn't work. I believe Dish has also obsoleted some receivers, so some of them might not work at all (I believe I had to get rid of my relatively-current 942 (HD) in order to get mp4 HD with the 622).