Configuring IIS to Run 32-bit ASP.NET Applications on 64-bit Windows

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1

If you intend to run 32-bit ASP.NET applications on 64-bit Windows, you must configure IIS to create 32-bit worker processes. For more information about running 32-bit applications on 64-bit Windows, see Running 32-bit Applications on 64-bit Windows.

IIS cannot run 32-bit and 64-bit applications concurrently on the same server.

To enable IIS 6.0 to run 32-bit ASP.NET applications on 64-bit Windows
Open a command prompt and navigate to the %systemdrive%\Inetpub\AdminScripts directory.

Type the following command:

cscript.exe adsutil.vbs set W3SVC/AppPools/Enable32BitAppOnWin64 true

Press ENTER.

Download and install the Microsoft .NET Framework Version 1.1 Redistributable Package.