This addin caused outlook to start slowly

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C#

Outlook

AddIn

Hi,

I am developing an Outlook Addin Project using C#.NET 4.5
But After I deploy, Sometimes outlook disables my addin, and shows this message.
"This addin caused outlook to start slowly"" I dont know whats wrong with my addin.
This has only a few codes, and ThisAddIn_Startup is empty in this project.
Here is the code...

<pre lang="cs">public partial class ThisAddIn
   {
       private void ThisAddIn_Startup(object sender, System.EventArgs e)
       {

       }

       private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
       {
       }
       protected override Microsoft.Office.Core.IRibbonExtensibility CreateRibbonExtensibilityObject()
       {
           return new Ribbon1();
       }


       #region VSTO generated code

       /// <summary>
       /// Required method for Designer support - do not modify
       /// the contents of this method with the code editor.
       /// </summary>
       private void InternalStartup()
       {
           this.Startup += new System.EventHandler(ThisAddIn_Startup);
           this.Shutdown += new System.EventHandler(ThisAddIn_Shutdown);
       }

       #endregion
   }

<?xml version="1.0" encoding="UTF-8"?>
<customUI xmlns="http://schemas.microsoft.com/office/2009/07/customui"  önLoad="Ribbon_Load">
  <contextMenus>
    <contextMenu idMso="ContextMenuContactItem">
      <menuSeparator id="mniMailItemMenuSeparator" />
      <button id="customButton"
              label="Call using Software"   insertBeforeQ="Copy"
           imageMso="Call"
               önAction="OnMyButtonClick" />

    </contextMenu>
    <contextMenu idMso="ContextMenuMailItem">
      <menuSeparator id="mailmenusep1" />
      <button id="mailbutton" insertBeforeQ="Copy"
              label="Call using Software"
              
             imageMso="Call"
               önAction="MailItemCallNumbers"   />

    </contextMenu>
  </contextMenus>

</customUI>