What is wrong in server control events publication..

[Louis Dupont]

I have a gridview and a set of image buttons for grid pages navigation inside a server control, but events of such image buttons are not being fired, could you please take a look:

public class cSCGridNavigatorPanel: WebControl, INamingContainer
{ 
  ..
  protected ImageButton fbtnNext;
  ..
  public event ImageClickEventHandler btnNext_Click;
  protected void fbtnNext_Click(object sender,
                                ImageClickEventArgs e)
  {
    if (btnNext_Click != null)
      btnNext_Click(sender, e);
  }
  ..
  protected override void CreateChildControls() 
  { 
    ..
    fbtnFirst = new ImageButton(); 
    fbtnFirst.Click += new ImageClickEventHandler
                           (fbtnFirst_Click);	
    this.Controls.Add(fbtnFirst);    
    ..
  }
  
  protected override void Render(HtmlTextWriter writer)
  {
    EnsureChildControls();
    AddAttributesToRender(writer);  
    ..
    fbtnNext.RenderControl(writer);
    ..
  }
}

public class cSCGridWithNavigatorPanel: WebControl,
                                        INamingContainer 
{
  public cSCGridWithNavigatorPanel() {}
  ...
  GridView fDataGrid;
  GridNavigatorPanel fNavigatorPanelTop;
   
  protected void MoveNext(object sender,
                      System.Web.UI.ImageClickEventArgs e)
  {  		
     if (fDataGrid.CurrentPageIndex < 
           fDataGrid.PageCount-1) 
       fDataGrid.CurrentPageIndex += 1;
  }

  protected override void CreateChildControls() 
  {
    this.DataBind(); 
    fNavigatorPanelTop = new cSCGridNavigatorPanel
                   (this.ClientID,"fNavigatorPanelBottom");
    fNavigatorPanelTop.ID = "fNavigatorPanelTop";    
    ..
    fNavigatorPanelTop.btnNext_Click += new
                          ImageClickEventHandler(MoveNext);
    ..
    this.Controls.Add(fNavigatorPanelTop);
  }

  protected override void Render(HtmlTextWriter writer)
  {
    EnsureChildControls();
    AddAttributesToRender(writer);
    ..
    fNavigatorPanelTop.RenderControl(writer);
    ..
  }
}