Ajax Control Toolkit - ModalPopupExten der

[SD]

Hi,
I have to use the ModalPopupExten der prgrammatically ..
But the next sample doesn't work:
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protected Button bt;
protected Button bc;
protected Button b;
protected Panel p;
protected Label lb;
protected UpdatePanel up;
protected AjaxControlTool kit.ModalPopupE xtender mpe;

protected override void CreateChildCont rols()
{
base.CreateChil dControls();

up = new UpdatePanel();
up.ID = "UpdatePanelTes t";
up.ChildrenAsTr iggers = false;
up.UpdateMode = UpdatePanelUpda teMode.Conditio nal;
this.Controls.A dd(up);

bt = new Button();
bt.Text = "Cliquez Ici";
bt.ID = "btModalWindow" ;
up.ContentTempl ateContainer.Co ntrols.Add(bt);

p = new Panel();
p.ID = "Panel_Test ";
p.Style.Add("DI SPLAY", "none");
p.CssClass = "modalPopup ";
p.Controls.Add( new LiteralControl( "Cliquez sur OK!<br>"));

b = new Button();
b.ID = "OkButton";
b.Text = "OK";
p.Controls.Add( b);

bc = new Button();
bc.ID = "CancelButt on";
bc.Text = "Annuler";
p.Controls.Add( bc);
up.ContentTempl ateContainer.Co ntrols.Add(p);

mpe = new AjaxControlTool kit.ModalPopupE xtender();
mpe.ID = "modal_popup_co ntrol";
mpe.PopupContro lID = p.ID;
mpe.TargetContr olID = bt.ID;
mpe.BackgroundC ssClass = "modalBackgroun d";
mpe.DropShadow = true;
mpe.OkControlID = b.ID;
mpe.CancelContr olID = bc.ID;
mpe.OnCancelScr ipt = "alert('cancel' );";
mpe.OnOkScript = "alert('OK' );";
mpe.X = 300;
mpe.Y = 300;
up.ContentTempl ateContainer.Co ntrols.Add(mpe) ;

}

/// <summary>
/// Render this Web Part to the output parameter specified.
/// </summary>
/// <param name="output"Th e HTML writer to write out to </param>
protected override void RenderWebPart(H tmlTextWriter output)
{
this.EnsureChil dControls();
up.RenderContro l(output);
}
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Do you see errors?
Any suggestions ?
Thanks
SD