I am having this exact same problem, does anybody know how to fix it? I tried to reinstall the game, I moved the save games around, I even removed them completely but nothing seems to work. I feel like I am overlooking something obvious, does anybody know how to fix this issue? :S
Okay, I think I fixed it. The problem was that the game apparently REQUIRES the file with the saved games to be named "saved games". Since I am german and use a german version of windows, the file was named "Gespeicherte Spiele" ("saved games" in german) as a default. I renamed the file and... voilá. Now I'll have to check whether or not that has unforeseen conequences for other games, but I don't think so...