MGS: PW Memory Stick Error

[thegirlontheclouds]

So the game will work just fine and then an error shows up that says the save data doesn't exist and I need to insert the Memory Stick which is weird because my files are all there and when I reboot the game everything is fine; but as soon as I load the state where it gave me that error and I retry the problem consists. This happened before and I just changed the Memstick settings to "show in My Documents" instead of the "show in downloaded.txt" that was checked, but now the settings are all ok and it still says that my save data is missing- this problem never happened to me with MGS: PO and I have no idea how to fix it