Ajax HtmlEditorExtender image is not uploading

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ASP.NET

Ajax

Hi Expert,

My Website is in .net platform.

And my admin panel is hacked twice.Hackers hacked only html pages from fckeditor.

Now i am working on Ajax HtmlEditorExtender for news uploading.

But image uploading is not working.And onimageuploadcomplete is not firing.

Here is my code :

<asp1:HtmlEditorExtender runat="server"TargetControlID="txtBox1" DisplaySourceTab="true" ID="s1" onimageuploadcomplete="s1_ImageUploadComplete">
          <Toolbar>
               <asp1:InsertImage />
               </Toolbar>
          </asp1:HtmlEditorExtender>

protected void s1_ImageUploadComplete(object sender, AjaxControlToolkit.AjaxFileUploadEventArgs e)
   {
       try
       {
           String fullpath = Server.MapPath("~/Styles/") + e.FileName;
           s1.AjaxFileUpload.SaveAs(fullpath);
           e.PostedUrl = Page.ResolveUrl(fullpath);
       }
       catch (Exception ex)
       {
       }
   }

Please Help me.

Thanks in adv. & sorry for poor english.