How To Enable 32-bit worker process on Windows 2003 Server 64-bit

Before you configure IIS to run 32-bit applications on 64-bit Windows, note the following:

• IIS only supports 32bit worker processes in Worker Process Isolation mode on 64-bit Windows.
  
• On 64-bit Windows, the World Wide Web Publishing service can run 32-bit and 64-bit worker processes. Other IIS services like the IIS Admin service, the SMTP service, the NNTP service, and the FTP service run 64-bit processes only.
  
• On 64-bit Windows, the World Wide Web Publishing service does not support running 32-bit and 64-bit worker processes concurrently on the same server.
  

1. Open a command prompt and navigate to the %windir%\Inetpub\AdminScripts directory.

2. Type the following:

   cscript.exe adsutil.vbs set W3SVC/AppPools/Enable32BitAppOnWin64 1

3. Press ENTER.