HR24-100 not working correctly with Genie - DirecTV

I have an HR24-100 connected to my Genie and at times it shows the programs recorded on the Genie but when I play them the video and sound are jittery and start and stop to the point that is not watchable. At other times none of the Genie programs show up on the HR24 playlist. It worked OK for a few days after installation but it has never worked the way it should. I have reset both receivers repeatedly and in different order with no improvement. Any ideas or past experiences?

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