Checked the settings on it? Typical IP address to do that would be 192.168.1.1 or 192.168.1.100

You are hardwired direct to the router? Or using wireless device to connect? Both?!

Your symptoms are typical problem of making the connection but not passing the security (WEP, WPA) settings when using wireless. Also typical of having firewalled yourself off from the router, or the router firewalled you off from itself, cutting or restricting your "access" in some manner. Did you set all this up, or did someone else and you are a secondary user? For instance my youngest has time restrictions on when her computer can connect due to firewalled access settings tied to her MAC.