Cablevison 8300hd turns off when recording two shows with my dvr expander attached

Since I just attached  my 1TB MY DVR Expander to my cablevision 8300hd DVR I have experienced my Cablevision DVR shutting  off  twice when I am recording two shows at the same time and then begin to watch one of the shows that I am recording. When I check the space left to record it shows that I went from 11% to 84% space used  right after the cablevision box reboots. Does any one have any suggestions?  

Same thing happened to me.  Replorts are all over internet.  The company WD should address the problem.