See whether any of the fixes here help.
If LW Will Not Connect

If nothing there works, you'll see a link in that thread for posting system details...post those here.

When you set up port forwarding, did you use the instructions here?
Port Forwarding for the Westell 6100

LW's listening port, port in the 'manual port forward' box & port forwarded within the router's setup pages should all be the same number