IIS 6.0 64-bit to 32-bit

Posted on 2009-02-12
Last Modified: 2012-05-06

I have this problem:

This is complaining because you are trying to load a 32-bit filter and the web server is running in 64-bit mode.  So either you need to unload this filter, or change your web server to run in 32-bit mode.

How exactly do I unload this filter?

Question by:NursingCorp
    LVL 31

    Accepted Solution

    Running 32-bit Applications on 64-bit Windows (IIS 6.0)
    Windows Server 2003", Service Pack 1 enables IIS 6.0 to run 32-bit Web applications on 64-bit Windows using the Windows-32-on-Windows-64 (WOW64) compatibility layer. IIS 6.0 using WOW64 is intended to run 32-bit personal productivity applications needed by software developers and administrators, including 32-bit Internet Information Services (IIS) Web applications.
    On 64-bit Windows, 32-bit processes cannot load 64-bit DLLs, and 64-bit processes cannot load 32-bit DLLs. If you plan to run 32-bit applications on 64-bit Windows, you must configure IIS to create 32-bit worker processes. Once you have configured IIS to create 32-bit worker processes, you can run the following types of IIS applications on 64-bit Windows:

    taken from and more @

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