WDS : GUI or cmdlet : Access is denied

Hi,

I installed a new Windows 2012 R2 with WDS Role.
I choose the C:\Outils\WDS\RemoteInstall folder as folder destination.

When I check the ACL on this folder I found :

I don't find anywhere this group : WDSServer !

My problem is when I use cmdlet to import image :

Import-WdsBootImage -Path "C:\Temp\Generic_x86.wim" -NewImageName "Generic Windows PE (x86)" -NewDescription "Generic Windows PE (x86)" -NewFileName "Generic_x86.wim" -SkipVerify

I get :

Import-WdsBootImage : Access is denied.

Thank you for your help.

Ludovic.