Is your LW connected properly (all green/blue connection bars)?
If LW is connected, try port forwarding. Your instructions are here:
Port Forwarding for the Motorola 2210-02-1006
Before you set up port forwarding, you'll need to set up a static IP address:
PortForward.com - Free Help Setting up Your Router or Firewall
LW's listening port, port in the 'manual port forward' box & port forwarded within modem/router setup must all be the same number