There may be something about this in the ReplayTV FAQ. But as far as I know, ReplayTV units channel listings and guide data are provided by Tribune Media Services, and either they don't have listings for Canada based cable companies, or don't provide them to ReplayTV units. There has been talk in the ReplayTV section of AVSForum from some Canada residents (perhaps just one) who did get their units working fine. So my advice would be to hop over to AVSForum and ask, if you haven't already done so.