I hope you're aware that Tiscali do shape bandwidth over peak hours of the day.
The belkin are not super reliable using UPnP & are thus much better port forwarded.
First things I'd suggest to try are: 1.
http://www.gnutellaforums.com/connec...t-connect.html (try all the suggestions there)
2. If still no good, try an earlier version such as one of these: LW 4.16, 14, or 12
LimeWire 4.16.3 Download,
___ LimeWire 4.14 Download,
___ LimeWire 4.12.
It might be an idea to try LW 4.12
Then go through the above suggestions again.
If still no good then let us know.