Do you have WEP or IP filters on? Is your IP range set to the same as the router (should be 192.168.0.x for d-link unless they've changed then it would liekly be 192.168.1.x). If you are on cable you should set the gateway and dns to the routers network address. If you are on DSL you may have to set the gateway to the routers network address and the DNS to the modems network address. If you set up the wired network then you know what you are doing already and should just check the wireless options on your router. You aren't running 98 or 98se on the machine that won't connect are you? I hate wireless cards on 98se.