Did the static IP setup go ok? If the other computer's port forwarded, you'll have to have a different static IP than the other one has.

Did you make sure that your port forwarded within the router was the same as LW's listening port & the port in the 'manual port forward' field within LW's firewall config? All those port numbers have to be the same.

Is your listening port different to the listening port of the other computer? Don't use the same port number for both. Try using port 64049 & see what happens.