I am trying to add the following script into my kixtart script. When it runs i get the error unknow command adscomputer. Can anyone help me with the syntax?

$Set adsComputer = GetObject("WinNT://" & @Domain & "/" & @WKSTA & "/LanmanServer,FileService")
$adsComputer.Description = "User: @Fullname"
$adsComputer.SetInfo