Sfcb esx 4.0 C#

Hi,

I'm trying to access the WBEM service of the sfcb on the ESX Server 4.0 and all my requests end up with this error "(501) not implemented".

I use wbemsharp (http://code.google.com/p/wbemtools/wiki/Intro) for my client and the connection is over HTTPS.

Can any one help. Is there any other alternate wbem cim client available in C#.

Thanks in advance

Anand