Instacake UPGRADED HR10-250 lost authorization

Please help. Last fall I purchased a used HR10-250 missing the hard drive. Loaded a new Hitachi 500GB hard drive with Instacake, network capable and checked no for allow updates. Contacted DTv and they sent me an access card. The system has worked great until a recent power outage when it re-booted, now getting error "call customer service, ext. 726". First contacted DTv Jan 29'th and they said that they are working on it, should take 3-5 days. Now DirecTv claims that since there are dozens of receivers with ID=0429 4967 2952 they can't turn me back on. Does this mean that all HR10-250s loaded through Instacake are doomed??? They also say since I modified the unit they cannot give me any credit toward an new DVR, not even TIVO. This sounds like the left hand doesn't know what the right is doing, total hogwash! Anyone else ever have this problem? Thanks, Jeff.