WMI on NT4 Server

[Rico69]

Hello all,
I'm trying to install WMI on a NT4 Server SP6a.
When I run WMI config manager, I get the following messages:

"Failed to initialize all required WMI classes

Win32_Processor: WMI: Invalid namespace
Win32_WMISetting: WMI: Invalid namespace
Security information: Successful
Win32_OperatingSystem: WMI: Invalid namespace"

Plus I can't click on the different tabs of the WMI config window.
And then when I run a software using WMI, I get this:
"Could not connect to WMI, ensure WMI is installed and configured.
Error occured: 8004100e."

I would really appreciate some help !!!
thanks in advance.
Eric.