Tiscali are a pain, so many people are having probs with them lately.

Double check the config of your XP firewall
Firewall setup

Some people have found changing ports helps. To do this, in LW go tools > options > advanced > firewall config. There you can change LW's listening port. Good ones to try are 49152 - 65535. Someone recently got connected after weeks of pain using port 139. If you do change ports, you'd also have to change any specific ports allowed thru a software firewall & any ports forwarded thru a router.

Tiscali & Limewire
can't connect between 5pm-11pm
I have found a solution to getting Limewire to work with Tiscali

Your router has a firewall. Try port forwarding & see if the brick wall disappears. Here are the instructions for your router
http://www.portforward.com/english/r...T/Limewire.htm

Don't forget that LW's listening port, port in the 'manual port forward' box & port forwarded within the router all have to be the same number

You could also see whether Java 1.6 makes any difference (it did for one person). Use the JRE offline installer here & remove your old Java versions before installing the new one.
http://java.sun.com/javase/downloads/index.jsp