1. Make sure your Sunbelt Personal Firewall has a rule allowing LW full access.

2. D-Links are usually best port forwarded. (a) most important is first step, setting up a static ip: Static ip for XP, (b) Settings for D-Link & LW: PortForward.com - Free Help Setting up Your Router or Firewall I don't know whether your model is simply a modem or a router or whether it has a NAT protection built in.

3. When updating to the newer version of LW that's out now, good idea to delete the LW prefs folder. 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.)

4. Go to LW's menu bar, Tools > Options > Advanced > Performance & disable all options. Then go to File menu > Disconnect & wait a couple of mins. Then File menu > Connect.