Andrew,

Can you give me more details about what's wrong?

We are using the following code to get the RootImageDirectory:

 

  Public Overrides Property RootImageDirectory() As String
            Get
                If _RootImageDirectory = "" Then
                    Dim _portalSettings As PortalSettings = DotNetNuke.Entities.Portals.PortalController.GetCurrentPortalSettings

                    RootImageDirectory = _portalSettings.HomeDirectory.Substring(_portalSettings.HomeDirectory.IndexOf("/Portals/"))
                Else
                    RootImageDirectory = _RootImageDirectory
                End If

            End Get
            Set(ByVal Value As String)
                _RootImageDirectory = Value
            End Set
 End Property