Description:

Internet Information Services in Microsoft Windows 2003 x64 is a 64-bit application.  This means, if you want to run 32-bit ISAPI DLLs with IIS6 on Microsoft Windows 2003 x64, you will need to enable 32-bit Application Pools. 

Prerequisite(s):

• Administrator access to IIS server.

Fix:

1.  Login to the IIS sever as an administrator.
2.  Open up a Command Prompt window, and type the following command to enable 32-bit Application Pools:
cscript %SystemDrive%\inetpub\AdminScripts\adsutil.vbs set w3svc/AppPools/Enable32bitAppOnWin64 1