I have the Tivo Desktop program installed and activated with my Tivo. The media key etc is all set up fine. However appart from when I reboot either my computer or Tivo I can't see my PC in my Tivo "Now Playing" list. When I reboot either Tivo or my PC it seems to show there for a short period of time. I'm able to transfer programs etc with no trouble. However if I transfer say one program of half and hour and then go back to Now Playing my PC no longer shows. I have checked my PC firewall etc and thats all fine. Any suggestions on what might be causing this?