Securing Wireless LANs with PEAP and Passwords

Hi everyone, I am trying to configure my SBS Server to Secure Wireless LANs
with PEAP and Passwords. I followed the instructions that I found on TechNet
except for running the script for IAS. I know it’s already included or
configured on my SBS Server. I applied all the settings on my GPO and the
clients seem to apply what’s on the GPO except for the Root Certificates. If
I check my available certificate on (Local Computer)\Trusted Root
Certification Authorities\Certificates the certificate is not on the list.
When I checked the event log I can only see one message which is listed
below. I also tried running the gpupdate /force quite a few times and it
still doesn’t apply the Certificate. I’ve also checked the steps and
re-apply most of the steps on the instruction but it doesn’t seems to change
anything, I’m still keep on getting the same message on my System Log. Any
help would be very much appreciated.


SYSTEM EVENT LOG:

Event Type: Warning
Event Source: IAS
Event Category: None
Event ID: 2
Date: 11/13/2005
Time: 10:53:09 PM
User: N/A
Computer: SERVER
Description:
User DOMAIN\User was denied access.
Fully-Qualified-User-Name = DOMAIN\User
NAS-IP-Address = 10.10.10.3
NAS-Identifier = ap
Called-Station-Identifier = 00cf.3407.fff0
Calling-Station-Identifier = 0ccc.4100.0450
Client-Friendly-Name = Cisco AccessPoint
Client-IP-Address = 10.10.10.3
NAS-Port-Type = Wireless - IEEE 802.11
NAS-Port = 1100
Proxy-Policy-Name = Use Windows authentication for all users
Authentication-Provider = Windows
Authentication-Server = <undetermined>
Policy-Name = Wireless LAN Access
Authentication-Type = PEAP
EAP-Type = <undetermined>
Reason-Code = 262
Reason = The supplied message is incomplete. The signature was not verified.