Does your router broadcast the ssid? if not you will need to manually configure your connection .
1. Open Connect to a Network by clicking the Start button , and then clicking Connect to.
2. Click Set up a connection or network.
3. Click Manually connect to a wireless network, and then type the network information.
The network will be added to your list of networks and will be available to connect to in the future when your computer is in range of the network.