Have you configured your laptop connection settings the same as your desktop. I see your router supports UPnP is you desktop set to port Forward or UPnP. Set the laptop up the same.
The link below is for setting your router/computer for Port Forward remember you must set up LimeWire and your computer up the same on all machines. If you are port forwarding each computer must have it's own static IP address.
http://portforward.com/english/route...G/Limewire.htm