Firstly I see that your Java needs to be updated to Java 6 as Vista requires it...
Uninstall your Java from the add/remove programs and then re-install the JRE offline version....(4th one down)
Java SE Downloads
Also you will need to open a port in your routers firewall for Limewire...
Here are your instructions...
Port Forwarding for the Netgear DG834G PortForward.com - Free Help Setting up Your Router or Firewall