Sounds like even if they are present, your global and config are messed up. To fix:
1. Make a separate copy of the save(s) you want to keep somewhere outside of .....\Peasants Quest NYD375\www\save
2. Go start a new game, just skip everything because it won't matter. Now save in whatever slot you want to put the new save into. This tells your global and config that there is a save file located there in the folder. If you want to restore multiple saves, make a new save in each of those spots. Close the game.
3. Reload game, make sure those saves you just made are loadable. Just making sure there isn't some other issue at hand. Close the game again.
4. Replace the new saves with the old saves you want to keep inside the .....\Peasants Quest NYD375\www\save folder.
5. Reload the game, you should be able to play your old saves.
--------------
Another issue someone may have that helps explain the issue at hand. Say someone wants me to look at their save, or I just want to play someone else's save, but I don't want to lose my save.
Say I have slot 10 free in my game. I go into my game, load any file and make a save in File 10. Close the game. Go get the save I want to import to my game and rename the file to "File10". Then I replace the File10 I just made in my folder, with the one I want to import.
Load the game, and load the save. If the global and config files aren't told that there is a save in that spot, even if I put that file into my folder my game won't be able to recognize them.