You did a port forwarding for your modem
If it still says "received incoming this session:false" with the infos you gave, it's probably only an error in the router config. Are you sure LW use port 6346 (look in options advanced)? You forwarded that port in router? Is your computer on a static IP ie 192.168.1.5 instead of 192.168.1.100?
Bonne chance