[Igal]

When I try to add sorth, a shared file from my pc (wifi win xp), I get a message: " error invalid argument". I do see my shared file. Few days before every thing was ok.

[Ned Scott]

Read this http://forum.xbmc.org/showthread.php?tid=92480

Then we can help you. Right now there's not enough info to tell us why it is not working for you.