Does Windows Server 2003 support 802.11i

I have two wireless adapters which support both WPA and WPA2. I am using
Windows XP Pro with SP2.

I am using a Windows Server 2003 as my RADUIS server. It is able to
authenticate my wireless station using PEAP and TKIP for encryption but I
can't connect when I try to authenticate with PEAP and AES. I have doubled
checked the wireless station and it is set to WPA with AES and my acesss
point is also configured to use AES. However, I can't associate with AES
selected. I can only associate with TKIP selected.

Any ideas would be appreciated.
Thanks

Todd