Be sure the dvrs match online at her account on Directv.com.
I forget the error message, since I am not in front of it, but it seemed to relate more to a connection issue than anything. I will check that, though.
The iPad should show you the dvrs it's seeing. Not sure how you have the receiver connected to the 5Ghz band?
The CCK works on either frequency. I put it on the 5GHz band for the purposes of isolating it, which seemingly hasn't done the trick.
Edit: I also sympathize with supporting new technology with mothers / mother-in-laws. . .
Even more so, it is primarily for the use of someone who is bed-ridden, so they don't have the option of getting up and fussing with things.
I had more success putting both my iPad and the CCK in the 2.8 ghz band on my dual-band router (not Belkin). I found that the 5 ghz band was just a little too prone to dead spots and drop offs to be reliable enough overall. Once I got them both on the same band, I've had everything rock solid for a while. Maybe that might help here?
I mostly mentioned the Belkin part just for completeness, but I will take that into account. The access point and both devices are all in one (big and strangely shaped) room, so it doesn't seem like it should be an issue, but it could be.
I've used the wireless CCK on the 5Ghz band from a couple of Linksys dual band routers with dd-wrt firmware and had no problems.
How are your dvrs connected? Swim or ethernet?
I didn't buy the router, but I'm 99% sure that it doesn't support DD-WRT or Tomato. I think I checked that first thing when I saw it.
There is only one DVR, HR20, so no swim. I've told her that if she wants to stick with DirecTV (well outside of contract) that she should ask for a newer model, but we want to make sure that this iPad part works before she commits to them for another 2 years.