...so what IP address and subnet mask does it have?
If it has a 169.254.x.x IP address with the subnet mask 255.255.0.0 then the adapter has been unable to get its address from the router and Windows has allocated this address, which won't get you online.
Has the laptop (which is presumably supposed to be connecting "wirelessly"), actually "connected" to the router? In other words, have you run the Site Monitor in its software to scan for "Available Networks", found the one with the SSID (network name) of your router and "connected" to that network, so that the little icon gets its "halo" to show it is connected.
Once connected properly to the wireless network, the adapter should get its IP address from the router. A "169.254" address should automatically update to that allocated by the router's DHCP server.