In this case you my want to use WPA enterprise for domain authentication.
This how to may help.
wireless setup
How to: setup WPA Enterprise on wireless client How to use Ad Hoc
connection Start wireless without logon Tips for Best Performance ...
www.howtonetworking.com/wireless.htm
--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com
"Graeme" <(E-Mail Removed)> wrote in message
news:74E5E536-2200-4766-9FBD-(E-Mail Removed)...
>I have around 30 laptops and 80 desktops (at a high school) to manage.
>We've
> removed the local accounts to prevent the recurrance of all sorts of
> problems
> that have plagued the students and teachers in the past. This means that
> students and teachers have to use their domain credentials - all good so
> far.
>
> The hardware is from a variety of manufacturers, but all clients are
> running
> XPproSP3 and the domain is Server2003sp2. All WAPs share the same SSID
> and
> WPA2 key, with different channels to provide coverage over the entire
> campus.
>
> The problem is with the laptops... The wireless network connection will
> not
> be active until someone is logged on, but they can't logon until they have
> a
> connection to the domain. Because there is some caching by default, there
> is
> no problem if a student uses the same laptop each time, but this is rare.
>
> How can the laptops, WAP, server, or domain be configured to allow
> wireless
> domain logon?