Computer account does not authenticate using wireless

Hi,
I'm using the Microsoft paper "Securing Wireless LAN's with PEAP and
Passwords" using WPA to configure my wireless network, before deploy the
solution I have test it on a small number of clients and every thing run OK.
After I deployed that solution to all of my wireless clients, I start to note
that the computer account does not authenticate on the DC, when users logon
for the first time they don't run the logon Scripts that only happens if they
Logoff and Logon again. I have noticed also that in the log of Access Point
some computers try to connect using WEP instead of EAS, how can I force
Computer autentication using EAS, but after user logon the wireless
connection is made using EAS. Can some one help me on this, I have check
every where but I can't see what I'm doing roung.

THANKS


Event logon IAS Server when I turn on a client that can’t authenticate
computer account
Event Type: Error
Event Source: IAS
Event Category: None
Event ID: 16
Date: 30-01-2006
Time: 9:29:05
User: N/A
Computer: DC
Description:
A RADIUS message with the Code field set to 2, which is not valid, was
received on port 1812 from RADIUS client AP100256. Valid values of the RADIUS
Code field are documented in RFC 2865.

Event Log IAS Server when the Client can authenticate the computer account
Event Type: Information
Event Source: IAS
Event Category: None
Event ID: 1
Date: 27-01-2006
Time: 18:24:17
User: N/A
Computer: DC
Description:
User host/hap-panica.hap.eu.honda.com was granted access.
Fully-Qualified-User-Name = HAP\WPC01$
NAS-IP-Address = 207.129.49.249
NAS-Identifier = <not present>
Client-Friendly-Name = AP1000256
Client-IP-Address = 192.168.0.249
Calling-Station-Identifier = 00-FF-FF-14-D7-9A
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 = Allow Wireless LAN Access
Authentication-Type = PEAP
EAP-Type = Secured password (EAP-MSCHAP v2)

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Hello World !!