All xgd3 burn't games will load on dash, but then say "disc not support" upon trying to play

Sorry for such a long thread title, just trying to get the most accurate help from the top-dawgs. :)

Here's the deal:

I work on computers/consoles/just about anything with a cord. I actually own a repair business for all the listed in the previous sentence.

First and formost, I do not want to play online with burned games ... just trying to make it where my kids can enjoy them offline. We have a xbox-slim if we ever want to go online, which we never do - I'm not paying 60 bucks for a game...

All xgd3 burn't games will load on dash, but then say "disc not support" upon trying to play