Treeview control doesn't show images

[Smokinghand]

I am trying to setup a treeview control to display all drives and folders on the PC. So far I can display all drives and folders but the images will not show except rarely. I am using an imagelist with 4 images (index 0-3). The code below is used to load the drives in the treeview control. I have tried using every type of image possible from bmp to png and nothing. I have tried the Appllication.EnableVisualStyles() which I now know isn't needed in vs 2008. I am also having problems with a picturebox in another form that shows nothing but a shadow of the image. I suspect this may be a setting somewhere maybe in vs 2008 but am not able to find one.

Dim drive As Integer = 0, dir As Integer = 0
 
        For drive = 0 To oDrives.Length - 1
            Dim oNode As New TreeNode
 
            Try
                oNode.ImageIndex = 3
                oNode.SelectedImageIndex = 3
                oNode.Text = oDrives(drive).ToString.Substring(0, 2)
                tvFolders.Nodes.Add(oNode)
                oNode.Nodes.Add("")
 
            Catch ex As Exception
                MsgBox("Cannot create initial node: " & ex.ToString)
            End Try
        Next
    End Sub

I will appreciate any ideas on this.