Powershell, WMI and SCCM!

Hi!

I would like to remotely Evaluate Machine policy via powershell! I can see in the WMI-tool that the class SMS_CLIENT in namespace "root\ccm" has a method called "EvaluateMachinePolicy".

But i cant see that method in powershell!

theoretically this command should work: 

(gwmi -Namespace "root\ccm" -Class sms_client).EvaluateMachinePolicy

But it does not and if i look wich methods there are i get this

PS C:\> (gwmi -Namespace "root\ccm" -Class sms_client) | gm


   TypeName: System.Management.ManagementObject#ROOT\ccm\SMS_Client

Name                    MemberType    Definition
----                    ----------    ----------
PSComputerName          AliasProperty PSComputerName = __SERVER
AllowLocalAdminOverride Property      bool AllowLocalAdminOverride {get;set;}
ClientType              Property      uint32 ClientType {get;set;}
ClientVersion           Property      string ClientVersion {get;set;}
EnableAutoAssignment    Property      bool EnableAutoAssignment {get;set;}
__CLASS                 Property      string __CLASS {get;set;}
__DERIVATION            Property      string[] __DERIVATION {get;set;}
__DYNASTY               Property      string __DYNASTY {get;set;}
__GENUS                 Property      int __GENUS {get;set;}
__NAMESPACE             Property      string __NAMESPACE {get;set;}
__PATH                  Property      string __PATH {get;set;}
__PROPERTY_COUNT        Property      int __PROPERTY_COUNT {get;set;}
__RELPATH               Property      string __RELPATH {get;set;}
__SERVER                Property      string __SERVER {get;set;}
__SUPERCLASS            Property      string __SUPERCLASS {get;set;}
ConvertFromDateTime     ScriptMethod  System.Object ConvertFromDateTime();
ConvertToDateTime       ScriptMethod  System.Object ConvertToDateTime();  

Why oh why? I get it to work with a VB-script that looks like this:

On Error Resume Next
        CompName="."
	Set WShell = CreateObject("WScript.Shell")
	Set smsClient = GetObject("winmgmts:{impersonationLevel=impersonate}!\\" &_
	CompName & "\root\ccm:SMS_Client")
    smsClient.RequestMachinePolicy
    smsclient.EvaluateMachinePolicy

Please help! 

// Mr Clint Eastwood