NPS de Reason Code: 23 hatası hk

iyi geceler.

Windows server 2008 r2 üzerinde kurulu olan NPS de aşağıdaki hatayı almaktayım ve 802.1x e dahil olan kullanıcılarım dogrulama işleminden geçemiyor. sorun neden kaynaklanıyor olabilir acaba .

Log Name:      Security
Source:        Microsoft-Windows-Security-Auditing
Date:          11/18/2012 1:25:50 AM
Event ID:      6273
Task Category: Network Policy Server
Level:         Information
Keywords:      Audit Failure
User:          N/A
Computer:      DC2.abc.com
Description:
Network Policy Server denied access to a user.

Contact the Network Policy Server administrator for more information.

User:
    Security ID:            abc\ilhan
    Account Name:            abc\ilhan
    Account Domain:            abc
    Fully Qualified Account Name:    abc\ilhan

Client Machine:
    Security ID:            NULL SID
    Account Name:            -
    Fully Qualified Account Name:    -
    OS-Version:            -
    Called Station Identifier:        00-0F-61-B4-6E-E0
    Calling Station Identifier:        58-B0-35-78-CB-A9

NAS:
    NAS IPv4 Address:        192.168.1.1
    NAS IPv6 Address:        -
    NAS Identifier:            SG0103N00N
    NAS Port-Type:            Wireless - IEEE 802.11
    NAS Port:            6

RADIUS Client:
    Client Friendly Name:        Access Controller
    Client IP Address:            192.168.1.1

Authentication Details:
    Connection Request Policy Name:    Kablosuz Erisim
    Network Policy Name:        Kablosuz Erisim
    Authentication Provider:        Windows
    Authentication Server:        DC2.abc.com
    Authentication Type:        PEAP
    EAP Type:            -
    Account Session Identifier:        3566343030383436
    Logging Results:            Accounting information was written to the local log file.
    Reason Code:            23
    Reason:                An error occurred during the Network Policy Server use of the Extensible Authentication Protocol (EAP). Check EAP log files for EAP errors.