I have a Humax Series 2 (DRT800). Software version 9.3.2-01-2-595. When I press the "Guide" button, it doesn't display the TV lineup like it should. Instead, it only shows information about the current program being shown. This button worked properly for years and years, and now suddenly won't work! I tried rebooting, and connecting to the Tivo service for updates, but still the same problem. Any ideas?