Why won't my PS3 fat play Return Fire PS1 game?

[Viva Las Vegas]

Does the PS3 have issues with some PS1 games? Return Fire is such a classic and it pains me for it to lock up at the same point every time I try to play it. It'll get to the start screen and no further. Any work around? Do non fat PS3's play it fine? Is it just mine? Thanks in advance for any help.

 

[Xrc6]

When I had my fat I encountered issues and ended up just buying a PS1 instead but at some point the drive stopped spinning so now I just run an emulator on my PC and no troubles. Now I have the thin ps3 but never tried any ps1 games on it.