I purchased a wrt160n router. I changed only the ssid and left the rest to default. Wired connection works, wireless does not. It can't find a ip address. I can get to the web interface. I'm trying to connect to a comcast cable modem, from a Dell Latitude D620 laptop. What might I be doing wrong? Do I have to use the network software that comes with the router? The network adapter has its own software. Thanks.