I downloaded NGS02 demo few days before, but when I put my NGS01 into the PS3 today, it shows an error message: The copyright protection information is invalid(80029513), anybody know what happened, I suspect all NGS01 are not able to run now, please help!

Did you try deleting the demo? Since it was the last thing you did on your system it is a good place to start. You can always download the demo again.