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Why won't my old x86 (32b) ASP .NET Applications work on my New x64 (64bit) Server?

I can't answer that question in detail, but I can say that on Windows 2003 servers under x64 you must explicitly set up IIS to Allow Web Service Extensions for ASP xxxxx (32) applications. In a console window, type:

cscript %SYSTEMDRIVE%\adminscripts\adsutil.vbs SET W3SVC/AppPools/Enable32bitAppOnWin64 1

Then proceed with the following steps:

  1. Open IIS; Web Service Extensions
  2. Click on Allow All Web Service extensions for a specific application
  3. Choose ASP Net vX.Xxxxx (32)
  4. Click OK
  5. In a command window type IISRESET

This should help get your application back online!

Other references include:

http://msdn.microsoft.com/en-us/library/k6h9cz8h(VS.80).aspx

http://www.iisadmin.co.uk/?p=15#more-15

 

Wednesday, November 26, 2008 9:19 AM

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