I am currently using the Anydvd / Clonedvd combo for making backups and everything is going well, however a couple of days agao I started getting an error message concerning the frequency change to 72 mgz" I have just been clicking o.k. and going on with the process, should I be doing something? When I was setting up the Anydvd settings the tutorial on Cd Freaks indicated that I should check the box that says, "if a DVD with 60HZ is inserted...Then it has 72 in the parameters row. What is this for? ...I'm confused. Can anyone tell me what the advantage or disadvantage of having this box checked is?