Indeed you have firewalls galore. Not that that's a bad thing but you will need to configure them to allow both LW & Java full access. You need to follow the instructions very carefully.

1. Instructions for XP Firewall: http://www.limewire.com/english/content/firewalls.shtml &
2. directly below that you will find instructions for Zonealarm firewall.

3. Your modem also has an internal NAT firewall. You will need to forward a port (open a port to allow LW full access. Use Port 6346 Port Forwarding intructions for the Efficient(Siemens) Speedstream 5100 Router & 1st you will need to set up a static ip or it won't work properly. You will see a link to setting up a static ip on the 1st line. Do that, then do the port forwarding.

4. Last of all Force ip within LW: Force IP instructions & sample image

Tell us how it goes. It's not as difficult as what you may think. Just follow the instructions very carefully. Good luck!