When you dial into a computer running Windows NT Server and Routing and Remote Access Service (RRAS), the following error message may be displayed on your RAS client computer: Additionally, the following error is logged in the Event Viewer of the Windows NT 4.0 RRAS server (after every attempted incoming call): Incoming calls to the Windows NT RRAS server are not able to connect.

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This problem occurs because your Windows NT RRAS server's authentication and encryption settings are set to require Microsoft encrypted authentication and you are using Remote Authentication Dial-In User Service (RADIUS) as your authentication provider.

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To resolve this problem, use one of the following methods:

•	Set Authentication and Encryption settings to Require encrypted authentication or Allow any authentication including clear text. -or-
•	Leave Authentication and Encryption settings set to Require Microsoft encrypted authentication and set OfferMSCHAP to 1 in the registry. For additional information, click the article number below to view the article in the Microsoft Knowledge Base: 219283 (http://support.microsoft.com/kb/219283/EN-US/) How to enable MS-CHAP with Radius authentication

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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Microsoft has released an improved version of MS-CHAP. For more information about MS-CHAP version 2, visit the following Microsoft Web site:

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