defective psp games

I bought star wars battlefront renegade squadron on amazon but it would not stop freezing up. My psp works great on my other games. what should I do? are defective games a problem on the psp? Is this and issue for you? defective psp games
i had a problem with Wipeout Pure USED. since its an old game the used copies tend to be scratched and or have cracked cases. The thing was the store had an old psp and the game worked. but it would not work in my psp slim. but i have never had a problem with a newer game. my copy of ace combat x is used, but it works great.defective psp games
[This message was deleted at the request of the original poster]
that umd is stracthed or something so you will not play aitanytime sooon