Instructions how to port forward your router in my first post above. Did you follow the directions properly? Set up a static ip as the very first step (otherwise it will not work). You could try port forwarding a different port such as one between 49152 - 65535 & set LW's connection & listening ports the same as the one you port forward for the Motorolla.

Perhaps your motorolla has a strength of security setting. Some routers do. I didn't know the motorolla had one but worth investigating. You do need the NAT enabled within your router for safety. Opening a port for LW however should be fine as that's what LW would do automatically using UPnP, however experience on these forums suggests that model does not work well with UPnP which is why port forwarding is generally the best step.