WinRM - The CIM namespace Root/Microsoft/Windows/TaskScheduler is invalid.

Hey,

I try to create a scheduledtask using powershell on Windows 7 SP1 machine.

Command look like:

$A = New-ScheduledTaskAction –Execute $Command
$S = New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -DontStopOnIdleEnd -Hidden -Priority 9
$Task = Register-ScheduledTask -TaskName $TaskName -Action $A -User $RunAsUser -CimSession $CompName -RunLevel Highest -Settings $S -Forc

But on last command I receive the following error:

Register-ScheduledTask : The WS-Management service cannot process the request. The CIM namespace Root/Microsoft/Windows/TaskScheduler is invalid. 

Running the same command on Windows 8.1 everything is okay.
Having a look at both devices I can see that the WMI namespace on Win 8.1 is available but not on windows 7 SP1.

How is the procedure to get this namespace?

Windows Management Framework 4.0 is already installed on the Windows 7 SP1 machine.