Set wallpaper using OU-policy

Question

Hy,
I'm trying to write a script for a GPO to set a default background for a OU.
This is what i came up whith:
PS C:\> new-gpo -name WP_ICT3 |new-gplink -target "ou=All_ICT,DC=WD,DC=local" | Set-ItemProperty
-path H:\ICT_DATA\WP\logo-DictB.jpeg -Name "Wallpaper
 ICT" -Value 10
It results in the following error:
Set-ItemProperty : The input object cannot be bound to any parameters for the command either because the
command does not take pipeline input or the
input and its properties do not match any of the parameters that take pipeline input.
At line:1 char:73
+ new-gpo -name WP_ICT3 |new-gplink -target "ou=All_ICT,DC=WD,DC=local" | Set-Item ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (Microsoft.GroupPolicy.GpoLink:PSObject)
[Set-ItemProperty], ParameterBindingException
    + FullyQualifiedErrorId : InputObjectNotBound,Microsoft.PowerShell.Commands.SetItemPropertyCommand
Does anyone knows what i'm doing wrong? And can you explain it?

Answer 1

found it, but not where you said it was. In the control panel, the left column, i had to click the policy and then in the right column fold down register/wallpaper/general and there it was (sorry, its dutch)
Onderdeel HKEY_CURRENT_USER 
Sleutelpad Control Panel\Desktop 
Waardenaam Wallpaper 
Waardetype REG_SZ 
Waardegegevens H:\ICT_DATA\WP\logo-DictB.jpg 
What i noticed when i right-clicked on the policy-name in the left column and i looked at the status of the group-policy was that although the policy was turned on, the configuration for the users was turned off and the configuration for the computers was
turned off and all settings was turned off.
This doesn't seem wright.