Karen!! I had the EXACT same problem as you. Started with MP3Downloading and through all the others, ended up at Limewire. I finally just moved all my music to a general folder on my Hard drive and uninstalled and deleted every music downloader I had. Restarted my computer and went to Limewire.com. I disabled my Norton Anti-virus and I got the Limewire 4.12.11 Pro version. Followed everything to the T AND IT WORKED!!!! After I downloaded a song to make sure I wasnt seeing things, I put my AntiVirus back on and everything was fine. I went through the same crap as you and was in tears because I could not get straight answers or ANY answers what so ever. I hope this helps ( I do realize you were having issues back in December...me too!!).
Hope it works for you as easy as it worked for me. I had to do NOTHING with my ISP or #'s.