Ok about 2 years ago I bought an 512 from a friend well about a month ago I decide to hook it up. Called Dish and got a tech to come out in install the receiver, He said the receiver will work but we need a new smart card, he said it will be a week to get the card ok a week goes buy no card, so we called, they said that that receiver is old and they don't support it any more, ok understandable. So I went on there website and seen them advertising the 625 so I found a new one on ebay for $100 so I bought it. Now it gets here we hook it up and called dish to activate it. They start to activate the reviver but every time it activates it deactivates on of my other receivers (I have a 722k and 222k), Ok now after some time of this they then say I can't be done because the 625 is not HD so we then called again 2 hours later and ask why won't they activate if it still picks up the signal and displays the free channels (DIY and AMC) mad at this point we threaten to go to Direct TV so they offer to take $60 off our bill, ok still mad because we don't want money off our bill we just want to add this room on, we hung up so then I decide to chat with tech support on there website this guy told us that because we live in an area that have Mpeg4 system that they wont activate receiver that are Mpeg2. I just wanted to share my story guy.