I guess you work with Java to use the Development kit. That's normally a bit oversized for most people's needs.

Chances are you haven't set the XP firewall up to be configured to allow LW full access; Firewall configuration instructions (click on link)

If still no good, then try deleting your LW Preferences folder whilst LW is closed; instructions here: Point #2 & 3 in Fixes for Limewire (sample image included at bottom of page.)


NetCom devices nowadays come with & already enabled for UPnP. However, it depends how old your model is. If still connection problems -> You may need to do a port forwarding for LW; find your model here PortForward.com - Free Help Setting up Your Router or Firewall but remember setting up a static ip is the first and most important thing to do in this process.