Treeview custom control in C#.. HEEELPPP!!!

[zyanide]

Hi there,
im developing a custom treeview control based on the usercontrol ..
i've created a property TreeNodes that returns the contained treeview.Nodes collection..
the problem is:
when i click in design view for editing the nodes, it does not display the thumbnailed images from the imagelist attached to the custom control.
Adding manually the index for the imageindex works, but i want to give a professional feeling to the control and show the dropdown list with the thumbnailed images.

the code in the custom control is:

public TreeNodeCollection Nodes
{
get { return this.treeView1.Nodes; }
}

[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
public ImageList ImageList
{
get { return this.treeView1.ImageList; }
set { this.treeView1.ImageList = value;}
}

[Editor("System.Windows.Forms.Design.ImageIndexEditor", typeof(System.Drawing.Design.UITypeEditor)),
TypeConverter(typeof(ImageIndexConverter))]
public int ImageIndex
{
get { return this.treeView1.ImageIndex; }
set { this.treeView1.ImageIndex = value; }
}

Thanks in advance!!