hotspot with Active Directory RADIUS

Dear all,

I’m trying to using hotspot with RADIUS authentication.
I have a RouterOS v. 5.6 and a Windows Server 2003 Active Directory domain controller.
I followed this wiki: http://wiki.mikrotik.com/wiki/AAA_with_Active_Directory
My Mikrotik can communicate with AD server but the winXP domain client cannot access to hotspot with the AD authentication.
Could someone help me?? Thanks!!!

is your configuration correct? hotspot, radius, IAS ???