ISA error What is wrong?

[DBarnes]

This is a windows 2003 Server and a windows vista laptop.
This is the error I am getting. This is a wirless policy.

Event Type: Warning
Event Source: IAS
Event Category: None
Event ID: 2
Date: 12/20/2007
Time: 8:36:47 AM
User: N/A
Computer: LA-DC3
Description:
User L*****\LATRAIN1 was denied access.
Fully-Qualified-User-Name = L*****.com/State Office Users/Training Laptops/LATRAIN1
NAS-IP-Address = 10.128.50.2
NAS-Identifier = LA-4400
Called-Station-Identifier = 00-1D-71-09-49-E0:LFB-Wireless
Calling-Station-Identifier = 00-1B-77-AF-CE-82
Client-Friendly-Name = Cisco 4402
Client-IP-Address = 10.128.50.2
NAS-Port-Type = Wireless - IEEE 802.11
NAS-Port = 1
Proxy-Policy-Name = Use Windows authentication for all users
Authentication-Provider = Windows
Authentication-Server = <undetermined>
Policy-Name = Wireless Authentication
Authentication-Type = PEAP
EAP-Type = <undetermined>
Reason-Code = 262
Reason = The supplied message is incomplete. The signature was not verified.