There are no instructions for the 330 at portforward.com, but you could try the 536, that's the one I have and they are more than likely the same...
I really think your problem lays with Tiscali
http://www.gnutellaforums.com/showth...hlight=tiscali but give this ago anyway...
You really need to follow the instructions exactly especially the static IP part, as if you miss a step it will not work...
http://www.portforward.com/english/r...6/Limewire.htm