Does it create a save file in the first place? Try saving the game, then look in the game folder for a save file. If there is one, try backing it up. If there isn't one after you save at a crow, extract the RAR file, your computer doesn't have permission to actually create the save files otherwise. You can also try running as an administrator but I doubt that's the problem. If none of these things work, I'm not sure what to do.