My family just acquired a new PC, and we're having some problems getting iTunes to work properly for us. Previously, my dad and I had set up a library to share, so we didn't have to rip some discs twice and take up extra space. Now, it won't do it. I'm not sure whether this is me being obtuse or an actual problem, but any insight is appreciated. Also, in the transition of the files, all my stuff was lost because my user account had been disabled. Damnit.
iTunes > Preferences > Sharing Are you sure 'Look for shared libraries' and 'Share my library on my local network' are checked on both computers? Otherwise, it could be a networking issue with your new computer - is it on the same network?