I have an ibook g4 connected wirelessly to a dlink router. Everything was working fine and without changing anything it can't connect to the internet. The wavy lines show a strong signal but the browser and e-mail app say server can't be found. I noticed that in the network section under airport and tcp/ip that the ip address was different from the router's. When renewed it said airport had its own contained ip address and might not be able to connect to the internet. When I tried manually putting in the router's address and rebooting, it said the router's ip address was already in use. Still no internet connection. I've used windows computers for 15 years, had my share of frustrations with them, but was always eventually able to straighten things out. This is my first apple computer, I got it because it's supposed to be easier to use than windows. It has been nothing but a continual pain in the neck and i'll never buy one again. Any ideas on how to get back on the internet?