i am sharing the correct folder - the one i save to. mac files do not have extensions after them (i.e. .mp3).
the odd thing is that if i download 10 *anything* (mp3, whatever...) at, say, 10:00am, those 10 *anythings* will immediately show up as being shared. then i shut off the program. if i start it up 10 minutes later, it shows that i am sharing nothing.

are there some extensions that maybe i should try entering into the list or ones to share, that are not there by default, that might help?