Call of Duty: World at War ERROR

I keep trying to load my game but once the little loading bar thing finishes it takes me back to the title screen and I get an ERROR message that says "Save game saved with different script files". First what does that mean and second do I have to start a new game?

I think i had the same problem... but I just started the mission again and it worked from there.

I keep trying to load my game but once the little loading bar thing finishes it takes me back to the title screen and I get an ERROR message that says "Save game saved with different script files". First what does that mean and second do I have to start a new game?

tinkles87