So you tried deleting your LW preferences folder, replacing the gnutella file, disabling the performance & speed options, removing your incomplete files, etc. ?

I can only guess what your problem is .. since you haven't told me whether you are using a mac, linux or windows 98/2k/vista or DOS machine, lol. I have found out the isp you came to the forums with is CABLE & WIRELESS TELECOMMUNICATION SERVICES GMBH from UK. I haven't heard any reports about them. But am aware that many ISP's in UK are changing to anti p2p sharing tactics by either blocking them or slowing them down with low p2p bandwidth shaper filters. Another UK ISP started shaping p2p bandwidth less than 2 weeks ago.