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FIX: Update to behaviors of certain proxy servers on Windows Media Player 9 SeriesArticle ID: 839340 - View products that this article applies to. Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base: 256986
(http://support.microsoft.com/kb/256986/
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Description of the Microsoft Windows registryOn This PageSYMPTOMSWhen Microsoft Internet Explorer and Microsoft Windows Media Player are set to use different HTTP proxy servers, certain requests may go through the proxy server that is specified by Internet Explorer instead of going through the proxy server that is specified by Windows Media Player. These requests include but are not limited to the following types of scenarios:
For example scenarios, see the "More Information" section. CAUSEWindows Media Player uses Internet Explorer and its underlying WinINET or WinHTTP infrastructure for certain tasks during playback of content. If the destination server does exist outside the Windows Media Player proxy server but the destination server does not exist outside the Internet Explorer proxy server, the player cannot connect to the content. To maximize startup times, the player also assumes certain things based on the request. Because some Web servers and some proxy servers use a port in the 8000 through 9000 range, the player tries to do a progressive download of the requested content. When the player tries to do this, the player uses the Internet Explorer proxy server settings. RESOLUTIONA supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next update that contains this hotfix. To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site: http://support.microsoft.com/contactus/?ws=support Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
(http://support.microsoft.com/contactus/?ws=support)
The following file is available for download from the Microsoft Download Center: Collapse this image 
(http://download.microsoft.com/download/6/4/f/64f86e96-893c-4eb8-8230-9d1cfadcd24b/windowsmedia9-kb839340-enu.exe)
For more information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base: 119591
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.
(http://support.microsoft.com/kb/119591/
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How to obtain Microsoft support files from online services
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel. Date Time Version Size File name -------------------------------------------------------------- 17-Mar-2004 15:26 9.0.0.3147 4,685,824 Wmp.dll 17-Mar-2004 15:35 9.0.0.3147 2,070,640 Wmvcore.dll STATUSMicrosoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. MORE INFORMATIONExample scenarioFor example, the player tries to use progressive download, and the URL request is in the range of ports 8000 through 9000. If you apply this hotfix in this situation, the player automatically uses the Windows Media Player proxy server if the player cannot serve the request by means of the Internet Explorer proxy server. This behavior is known as rollover.Other scenariosFor the other scenarios that are listed in the "Symptoms" section, Microsoft recommends that you do not change the default behavior of Windows Media Player. Sometimes, a third-party application that embedded the Windows Media Player ActiveX control relies on this behavior from earlier versions. This hotfix also permits these applications to enable compatibility with the behavior from earlier versions. You can enable the compatibility either programmatically or by means of the registry.Registry controlled behaviorWhen you enable these registry values, the player behaves as specified by the appropriate flag.Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk. Behavior that is specific to Windows Media PlayerTo control the behavior that is specific to Windows Media Player, follow these steps:
Behavior for applications that are based on Windows Media Format SDKTo control behavior for any application that is based on Windows Media Format SDK (this includes Windows Media Player), follow these steps:
Atom controlled behaviorThe settings that are mentioned earlier can also be set programmatically by means of an atom. Following are the atom values:
For more information about using atoms, visit the following MSDN Web site: AddAtom Function http://msdn2.microsoft.com/en-us/library/ms649056.aspx
(http://msdn2.microsoft.com/en-us/library/ms649056.aspx)
PropertiesArticle ID: 839340 - Last Review: May 18, 2007 - Revision: 2.5 APPLIES TO
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