I have a Western Digital My DVR 1 TB Expander(WD10000F032). It has a big sticker that says TiVo verified and has worked fine on my TiVo HD. I replaced both my TiVO HD units with TiVo Premiers and neither one will reconize the drive. I know that I will lose all of the recored shows, but I cannot get it to work at all on either unit. Anyone have any ideas?