Have you been able to use LW successfully on your Vista PC at all? You say that you've read the forums but you don't say what fixes you've tried

Try this: Delete LW's preferences folder when LW's properly closed. See point 3 here & also point 2 if you've used older versions of LW in the past (there could be a folder in either location).
Fixes for LimeWire
This will kill all of your settings within options, you'll have to go back through afterwards & reset things. If you're not sure of your settings, go through LW's tools > options & write them all down, so that you can reset things later.
LimeWire Pref Folder in Vista

If that's no help, try updating your Java version. Use the JRE offline installer & remove your current Java version before you install this one.
Java SE Downloads

Is your router a WGR614 v6 (I can't find a WGR14 v6)?? Try port forwarding for your router. Find your router in the list here, then choose LW from the list of programs & follow the instructions from there.
PortForward.com - Free Help Setting up Your Router or Firewall
Don't forget the step of setting up a static IP address, if that's part of the instructions. LW's listening port, port in the 'manual port forward' box & port forwarded within the router all have to be the same number.

Also, this has worked for some people.
General Connection problems