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Question: My panasonic DMREZ 28 will no longer record DirecTV. WHY>

My Panasonic DMR EZ28 will no longer record from DirecTV.
It used to just fine. Now it says recording stopped.
Cannot record copyrighted material. I am not trying to
bootlegg or pirate anything, just record House to watch at a different time or later date. WHat happened that i can no longer do this?? Any help would be appreciated.