the best way of making sure the router really does see your computer is to open up a browser and type the ip address of the router into the address bar. for example, if the router address is 184.108.40.206, you would type http://220.127.116.11
. now if you've set it up right, there should be a popup from your router asking you for username and password to access configuration.
I've also had this problem with my router setup. I found that sygate firewall was blocking my access. so try turning off your firewall if you have one. that's all I can think of about router problems. manually configuring the ip will not work. try typing in command prompt, 'ipconfig/release', followed by 'ipconfig/renew', without the quotes and see if it can come up with a new ip address for itself.