Did you configure your firewall so it allows LW full access (advisable not to have 2 active firewalls b/c they can interfere with each other); Firewall configuration instructions (click on link)

See Corrupt files due to firewall: http://www.gnutellaforums.com/showth...threadid=39368

Also see T3 Spammers; mp3 Bit-Rates Versus File Sizes