I have a Toshiba RS-TX20 and inadvertently the parental controls appear to have been set on my unit and I have no idea what they are. This was discovered when trying to burn a DVD today. I then tried doing a "clear and delete" to reset the system but once again, the four digit parental controls were requested. I then attempted to create an account at Tivo to contact customer support and their system says the serial number is invalid. I'm assuming that's since the unit was bought in 2005. If anyone has any advice to get this working it would be most appreciated.