Are you using the correct default settings click here
In particular, your address should be;
(not just 192.168.0.1 as occasionally depending on your browser settings, this does not work)
Username = admin
Password = password
Often on Routers, these are case sensitive,so make sure you type them exactly as my link.
Also, if XP's firewall is activated, de-activate it for the duration of getting your network working properly. This is without question, the single most cause of grief when trying to get a network working.