Internet Authentication Service

Hi.

Where do I find a explanation for the error-codes in
Evenlog concerning IAS?
I get this message in the System-log:

Event id: 3 Computer: EDUSRV01 Source: IAS User: Time
Generated: 2004/02/03 08:22:31 Message:
Access request for user (E-Mail Removed)L was
discarded.
Fully-Qualified-User-Name = EDU\sskht01
NAS-IP-Address = 192.168.44.33
NAS-Identifier = CIL4
Called-Station-Identifier = 00022d3ce8f2 Calling-Station-
Identifier = 00022d19838c Client-Friendly-Name = CILWLAN4
Client-IP-Address = 192.168.44.33 NAS-Port-Type =
Wireless - IEEE 802.11 NAS-Port = %%2147483686 Proxy-
Policy-Name = Use Windows authentication for all users
Authentication-Provider = %%2147483688 Authentication-
Server = %%2147483685 Reason-Code = 97 Reason = %%4193

What is the explanation for "Reason-Code = 97"
and "Reason = %%4193"?

/Jon