See if port forwarding fixes things. Use the instructions here
http://www.portforward.com/english/r...4/Limewire.htm

Don't forget to set up a static IP first, the instructions have a link for that

Remember...LW's listening port, port forwarded thru your router & port in the 'manual port forward' box within LW all have to be the same number

You could also try this, but port forwarding's likely to give you better results...
If the router supports UPnP, enable it within the router & choose the UPnP option within LW's tools > options > advanced > firewall config. Apply > ok.