Your router does not support loopback. So using your external IP from inside your network isn't going to work as you expect it. It will either cause an error or you'll get the router setup page.
Follow the directions at http://www.portforward.com/english/routers/port_forwarding/Actiontec/GT701WG/HTTP.htm
This shows the correct method to configure your router.i follwed the link and did what i ...
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