Microsoft KB Archive/182975

= XCON: X.25 Stack Installed But Unusable =

Article ID: 182975

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 4.0 Standard Edition

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This article was previously published under Q182975



IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information about how to do this, view the "Restoring the Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe.



SYMPTOMS
Messages sent over a connector using an X.25 stack are not delivered. Non- delivery reports (NDRs) are returned. On the server, the application event log shows the following:

  Events 9409 The Microsoft MTA registry parameter is missing. The default value will be used. For these parameters: Eicon X.25 result threads Eicon X.25 connections Eicon wait timeout (ms)

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  Event 9106 An internal MTA error occurred. The X.25 interface failed to  initialize. Check to make sure the X.25 card is started. (14)



RESOLUTION
To resolve this problem, manually add the default keys using the Registry Editor.

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it. If you are running Windows NT, you should also update your Emergency Repair Disk (ERD).

  Start Registry Editor (Regedt32.exe), and go to the following subkey:

     HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services \MSEchangeMTA\Parameters

NOTE: The above registry key is all one path; it has been wrapped for readability.  On the Edit menu, click Add Value, and add the following information:

Eicon ait timeout (MS) as REG_DWORD 0x1F4

Eicon X.25 connections as REG_DWORD 0x14

Eicon X.25 result threads as REG_DWORD 0x2

 Quit Registry Editor. Restart the message transfer agent (MTA).</ol>

Additional query words: kbprb kbtshoot X25

Keywords: kbprb KB182975

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