IAS and WLAN issue

[sgwisby]

I set up a WLAN using IAS and am not able to connect to the network via the Wireless Access Points. The IAS server has the following in the system event logs:
Event Type: Error
Event Source: IAS
Event Category: None
Event ID: 3
Date: 7/17/2008
Time: 1:29:12 PM
User: N/A
Computer: AURORA
Description:
Access request for user OUHSC\dwisby was discarded.
Fully-Qualified-User-Name = OUHSC\dwisby
NAS-IP-Address = 10.130.9.14
NAS-Identifier = OUT-WLC3
Called-Station-Identifier = 00-13-19-36-DC-00:OUBASE
Calling-Station-Identifier = 00-13-E8-1D-CB-11
Client-Friendly-Name = OUT-WLC3
Client-IP-Address = 10.130.9.14
NAS-Port-Type = Wireless - IEEE 802.11
NAS-Port = 29
Proxy-Policy-Name = Use Windows authentication for all users
Authentication-Provider = Windows
Authentication-Server = <undetermined>
Reason-Code = 1
Reason = An internal error occurred. Check the system event log for additional information.

For more information, see Help and Support Center at

http://go.microsoft.com/fwlink/events.asp.

Data:
0000: 0d 03 09 80 ...?

The part that stands out to me is the Authentication-Server = <undetermined>.
Anyone have any suggestions on how to rectify this error and gain access via the WAP's.