I just got the HR54 on Friday, and I have an AM21 that I've used with no problems for about 4 years with the HR34 that I had previously. I've got the AM21 connected to the HR54, and the HR54 sees it. I'm able to start the setup process, enter my primary market ZIP code, and then it goes to the "Receiving satellite info..." screen. It starts the download process, and then part way through the download everything freezes up. I've tried three times now, and the same thing has happened all three times. The first time it froze at 66%, the second time it made it to 67% before it froze, and right now it's froze again at 66%. Each time I let it sit for quite a while, but it never gets any further along. I can't do anything at all with the HR54 once this freeze happens, and the only way I've been able to get the HR54 going again is to press the red reset button on the side. This never happened with the HR34. Anyone here using the HR54 with an AM21 successfully? Any ideas as to what's going on or how to get it working? I haven't bothered contacting DIRECTV since they've ended support on the AM21. It's not a huge deal, but occasionally there's something on one of the sub-channels (which DIRECTV doesn't carry) that I like to watch - or when WRAL is showing sports on the main channel that runs over they'll show the network programming on WRAL-2.