|1. Disable the Windows XP firewall and see if you can connect now. if you weren't using it and just installed the SP2 upgrade you do now and it's probably misconfigured.|
2. Go to the command prompt and enter
If you get 5 OKs back your adapter is working properly. Next enter
and get your gateway IP address. If it comes back blank you are not connected to your ISP no matter what the funny little blinking lights say. If you do get an address ping that and see if you get an OK.
If your adapter and/or internal modem aren't working, go into Hardware Configuration and see if the devices show up and if there's an exclamation mark across either of them. If there is uninstall the driver and reboot. Your PC should reinstall the drivers and fix the problem. MAKE SURE YOU HAVE THE RIGHT DRIVERS AVAILABLE FOR THEM. If you have a setup disc run that to re-install the drivers. You probably want to d/l the latest drivers from the manufacturers' websites and install those.