wireless router problem - doesnt accept new connection

Hi People,

We are setting a wireless network at home. The router is up and running and other computers are connected to the network except for a desktop.

I tried setting up the ip setting manually with subnet mask, ip, and DNS server but still the computer doesnt show the router administration page.

When i ping the router from this desktop, the router doesnt respond to this computer. Can anyone guide me iwth this?

Thanks!!!