This article was previously published under Q320280
The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.
When you are trying to play audio Windows Media content such as .wma, .wax, and .asx from a Web server through HTTP, Windows Media Player fails and the following error is generated:
The network connection has failed. (Error ID = 0xC00D0029)
Windows Media Player may still progressively download the file into the browser cache, but it cannot play the file from the HTTP link.
When third-party multimedia players assume file extension ownership of Windows Media content files, they may replace registry information that is necessary for Windows Media Player to play back those files even if Windows Media Player does not own the file extension.
Add the following registry value so that Windows Media Player can play the content types that are mentioned in the "Symptoms" section. These registry changes do not affect the performance or file extension ownership of the third-party multimedia player that owns the .wma extension. 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
Start Registry Editor (Regedt32.exe).
Locate, and then click the following key in the registry:
Microsoft Windows Media Player 6.4, Microsoft Windows Media Player 7.0, Microsoft Windows Media Player 7.1, Microsoft Windows Media Player 8.01, Microsoft Windows Media Player 8.01, Microsoft Windows Media Player 9 Series, Microsoft Windows Media Player 9 Series for Windows XP