Not Sharing
 

Using LimeWire 2.2.1, Mac OS 9.2.2, I can't share those files I already had (those notated as MaCast or iTunes). I do have them in the "shared" folder in LimeWire, and the options/sharing does list the folder correctly.

Did you check the Extensions list under Sharing in the Options dialog box? (Tools > Options from the menu bar). The files won't be shared if their filename extensions aren't in the list.