The files are being created, but there is a message on the starting screen about the flashplayer temp files. The config is set to allow.
When in the game, the autosave is there. Just my manual ones aren't.
Ah, yes, temporary Flash files are being blocked for some reason.
It's possible that you have that allowed, but only up to a certain size - worth checking in that Flashplayer options menu if you can increase the file space allowed.
It's also possible that some other application is interfering, maybe an antivirus, Windows settings, or PC-cleaning utility is blocking all Flash files, in which case it may be tricky to figure out what exactly the problem is. Sorry about that.