everytime i save my game and quit, then go back to it and try to load, there nothing there to load, its as if i've never played the gamehow come this is? I've just done the lost valley, and now i have to start right from the beginning. Any help please?

My dad's Front Lines game does that to him too. I think your computer needs defragmenting and delete some old crap off your computer if your not using it.