Your IP address is not a correct one for local private networks (router-based networks). Are you connected straight to the modem? Coz i'm pretty sure that IP is from your internet provider. (It has cable written all over it)
If you think you're connected to the router, double-check if the modem goes to the router's internet port, and the computer to any of the numbered ports of the router.
Then go to the command prompt (start->run_cmd) and type "ipconfig" there. Your default gateway is your router's ip address. That's the address you should be filling in on the URL bar of your web browser. Use admin as the password, and leave the username blank. Then go to the applications & gaming tab, and under that main tab go to port forwarding. Fill-in the ports and the IP address of your computer there. Make sure your computer is set for a static ip.
Message Edited by BladeTheWicked on 05-22-200711:43 PM