XBOX mod. question

[orkut]

My XBOX was modded years ago, and all my burned copies and original copies worked fine.

Recently, I went to the states and my friend there burned me some games he got from the internet and I tested them on his modded XBOX which had a different O.S. They worked, on his machine.

Now I try these burned games I brought from the states, and each game says that the disc is dirty or scratched. Also, now when I try my previously burned games, that have worked for years, they also say the disc is either dirty of scratched. Original games work though.

So, like, what's the problem? Is it a virus?

 

[xtest]

Very likely the dvd player in your xbox is older thomson unit which is picky as opposed to the newer ones likely from samsung that play more types of stuff.
look on google for type if dvd player that in your xbox and types of dvds it will play.