When you try to create a new Microsoft ASP.NET 1.1 application after you change the script mapping of the existing ASP.NET 1.1 Web application to ASP.NET 1.0 on a Microsoft Windows Server 2003-based computer, you may receive the following error message:

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This issue occurs because Windows Server 2003 does not allow two versions of ASP.NET to run in the same application pool.

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To work around the problem, do one of the following:

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Restart the IIS before you create a new ASP.NET 1.1 application. At the command prompt, type the following command: iisreset -or-

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Create an ASP.NET application in a separate application pool. Create the script-mapped application (ASP.NET 1.0) in a separate application pool -- for example, in the ScriptMapappPool application pool. Then, create a new ASP.NET 1.1 application in an application pool other than ScriptMapappPool. For more information about how to create an application pool, visit the following Microsoft Web site: Configuring Application Pools http://msdn2.microsoft.com/en-us/library/1kdfe21k(VS.80).aspx (http://msdn2.microsoft.com/en-us/library/1kdfe21k(VS.80).aspx)

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This behavior is by design.

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For more information about application pools, visit the following Microsoft Web site: For additional information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

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