Restart your computer, see if that makes any difference.

After you deleted the preferences folder, did you go through the setup wizard again when LW was started?
Deleting the prefs folder normally does the trick when all files get stuck connecting.

Do you have any other Java versions installed on your computer? Remove everything except the 1.6.0_03 that you're using now.

Try removing all of LW's rules within Norton & then reconfigure the firewall to allow LW.

Do you have the 4.14.8 installer saved? If you do, try uninstalling LW (for XP that's start > all programs > limewire > uninstall, I'm not sure of the Vista equivalent). Then use your computer's search to look for all files & folders with limewire in the name & delete those. Then reinstall LW.
If you don't have the installer saved, you'll lose that version if you reinstall LW from your Pro download page.