I do not believe that updating the driver for your network card will solve the problem, although you should always install the newest one for best operation. You can go to Compaq's support page here
and see if there is an update available for your model.
If WEP worked for you and WPA doesn't, then it is an encryption problem. Encryption happens on a different layer than the driver, which simply makes your Operating System work with your hardware.
If you are running Windows XP SP1 or SP2, update the operating system to XP Service Pack 3 for best WPA/WPA2 support.
XP Service Pack 1 computers do not support WPA by default and cannot support WPA2. To upgrade an XP SP1 computer to support WPA (but not WPA2), either
- install the "Windows XP Support Patch for Wi-Fi Protected Access" (link) from Microsoft, or
- upgrade the computer to XP SP2
XP Service Pack 2 computers by default support WPA but not WPA2. To upgrade an XP SP2 computer to also support WPA2, install the "Wireless Client Update for Windows XP SP2" (link
) from Microsoft.
If you have any more questions, just come back here and leave a comment - I'm happy to help.