Yep a few more things to try...
Go to file (limewire window) and click on disconnect and then connect...
Right-click the Limewire icon and go into properties and change compatability setting to Windows 2000. (but only if you're using Windows 2000 or later.) Somebody reported changing to Windows NT compatibility fixed their problem despite not using that operating system version.
Right-click on the Limewire icon on the desktop and click on Run as. Then it should come up showing the current user and then switch it over to Administrator. (but 'only' if you're the admin of your comp.!)
If none of those work we might have to look at your router as Linskys have Nat Firewalls and you may need to port forward, even though the other computers in your home are running limewire fine...
I will need the model number...