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Article ID: 253798 - Last Review: January 12, 2015 - Revision: 1.0

This article has been archived. It is offered "as is" and will no longer be updated.


When you try to stream media by using Microsoft Windows Media Player, you may receive the following error messages:
  • Fatal exception 0E has occurred at 0028:... in VXD UNIMODEM.
    Fatal Exception 0E has occurred at 0028:... in VXD Logger.
    Tapisrv has caused an Invalid Page Fault in module Kernel32.dll.


This issue can occur for any of the following reasons:
  • Direct Cable Connection or Virtual Private Networking is installed on your computer.
  • More than one modem is installed in your computer, or both a modem and a network adapter are installed in your computer.
  • The executable (.exe) file for ActiveSync 3.0 (Wcescomm.exe) is being loaded during startup.


Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756  ( ) How to back up and restore the registry in Windows

NOTE: This process hard codes your line speed in Windows Media Player and prevents it from checking the current line speed. This issue is generally a result of the driver configuration for the device. Verify that you are using the most current driver available for your device. Typically, it is better to permit Windows Media Player to dynamically detect your line connection speed.

To resolve this issue, override the bandwidth detection logic. To do so, create a new hexadecimal DWORD registry value called "ManualBandwidth" (in bits per second) in the following registry key:
The bandwidth value for the DWORD value should be set to match the download speed of your computer. This can override the Windows Media Player bandwidth detection logic that is used when negotiating bandwidth stream. The value should be set relative to the download bandwidth of the computer, for example:
  • For a 300kbps speed connection, use a hexadecimal value of 493e0.
  • For a 56kbps speed connection, use a hexadecimal value of fa00.
  • For a 256kbps speed connection, use a hexadecimal value of 3e800.
NOTE: It is a good idea to set the bandwidth slightly below the maximum so that you have sufficient bandwidth left over to browse the Web while streaming media.

Note that this article does not apply to Microsoft Windows Media Player 7.1. There is a manual bandwidth selection feature now available in Windows Media Player 7.1 and Microsoft Windows Media Player for Windows XP. This feature was added specifically to address this issue. If you change the setting on the Options menu for Media Player, and the problem still occurs, follow again the procedure that is described in this section to confirm that you changed the registry key value correctly. Additionally, make sure you are using the latest version of Windows Media Player. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:
259914  ( ) How to Change Connection Speed Information in Media Player 7

More information

For additional information about the interaction between Windows Media Player and the dynamic detection of bandwidth, click the article number below to view the article in the Microsoft Knowledge Base:
253642  ( ) Media Player Bandwidth Detection on Hybrid Internet Connection

Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use ( for other considerations.

Applies to
  • Microsoft Windows Media Player 6.4
  • Microsoft Windows Media Player 7.0
kbnosurvey kbarchive kbproductlink kbenv kberrmsg kbprb KB253798
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