iBook G4 shows that the airport has full connectivity (full bars) yet it doesn't connect and states that there is no IP address. The iBook connects using its internal airport to a Netgear Router. There is a PC that runs windows that is connected to the cable modem. For a month or so both computers were able to access the internet simultaneously. All of a sudden the computers are unable to access the internet at the same time. When I attempt to connect at the same time my Mac gives me an error stating that another IP is in use and so I can't connect. How can I give my iBook an IP address so that both computers can be online at the same time? THANKS!