How to NTLM authentification with IS 7.1.2 64 bits Windows


We need to call some web services on a SharePoint server. This Sharepoint server is being hosted also on a Windows server OS with IIS 6.0, and uses NTL for authentification.

We are currently are using IS 7.1.2 64 bits on Windows server.

Previously we could active Integrated Windows Authentication by enabling WmWin32 package… but this does not seem to work with NT 64 bits OS, we get this error:

webMethods.dll: Can’t load IA 32-bit .dll on a AMD 64-bit platform

What is the correct way for activating Integrated Windows Authentication on a 64 bits NT OS ?