What do u mean you don't have LW Pro? Did u spend $20? Did you get it from http://www.limewire.com/english/content/home.shtml ? That's where you can dwnld it from. You'll need to redwnld it if you've lost it (unless you made a backup on disk), be it the pro version or free version. After you've reinstalled it there might yet be solutions even though you're probably behind a firewall/router as arne_bab suggested.