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Accepted
JP Hellemons
Asked: 2010-07-31 05:20:07 +0800 CST

Host ASP.NET 4.0 in IIS 6 on Windows 2003 x64

  • 772

I want to host an ASP.NET 4.0 web application in IIS 6 on Windows 2003 R2 SP2 x64.

Is this even possible? I have the following under C:\WINDOWS\microsoft.net\Framework

  • 1.0.3705
  • 1.1.4322
  • 2.0.50727
  • 3.0
  • 3.5
  • 4.0.30319

and in C:\WINDOWS\microsoft.net\Framework64 the same except 1.0 and 1.1.

IIS 6 runs in 32 bit mode but there is no ASP.NET tab in the properties screen of the website. So I can't switch frameworks and don't know what frameworks runs in what application pool.

EDIT have tried what GregD suggested. That gave me back the tab in IIS so that I could set the proper framework for the website, but it gave me the following in the eventlog when I tried to start the application pool:

Could not load all ISAPI filters for site/service. Therefore startup aborted.

After a quick googling, I found this: http://nishantrana.wordpress.com/2008/09/09/service-unavailable-could-not-load-all-isapi-filters-for-siteservice-therefore-startup-aborted/

Which kind of puts me in a circle. Enabling and removing the 64 bit setting in the metabase.xml file.

Because aspnet_regiis -i told me that it couldn't work because IIS was in a 64-bit setting.

asp.net 64-bit application-pools windows-server-2003-r2

2 Answers

  1. Best Answer

    You can do it.

    On your web service extensions folder (in IIS Manager) are your asp.net extensions enabled for the different versions?

    Edited to add: To get your tab back try this:

    1) Stop the IIS Admin service (and any services that depend on it)

    2) Open C:\WINDOWS\system32\inetsrv\MetaBase.xml in notepad or your favorite XML Editor. DELETE the line that reads ‘Enable32BitAppOnWin64=”TRUE”’

    3) Restart IIS

    • 1

  2. It works now. It seems that I can't have the option in IIS to switch frameworks.

    I did: 

    C:\WINDOWS\microsoft.net\Framework\v4.0.30319>cscript c:\inetpub\adminscripts\adsutil.vbs SET /w3svc/AppPools/Enable32BitAppOnWin64 True

    and then 

    C:\WINDOWS\microsoft.net\Framework\v4.0.30319>aspnet_regiis.exe -i -enable

    and it worked! As I said, no ASP.NET tab is visible in IIS, but it works!

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