Outlook Addin Ribbon Item Context Menu doesn't appear

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C#

.NET

Outlook

Ribbon

Hi friends,

I am developing Outlook 2013 Addin. I am using a ribbon control to show a Context Menu for the Contact Items. Everything else is working. But Menu doesnt appear.... Please Help...
Here is the Code for Ribbon....

<?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 FPHone"   insertBeforeQ="Copy"
              getImage="LoadCustomImage"
               önAction="OnMyButtonClick" />

    </contextMenu>

  </contextMenus>

</customUI>

public void OnMyButtonClick(Office.IRibbonControl control)
       {


           if (control.Context is Outlook.Selection)
           {

               Outlook.Selection sel = control.Context as Outlook.Selection;
               Outlook.ContactItem cnt = sel[1];
               if (cnt != null && cnt.BusinessTelephoneNumber != null)
               {
                   string cmdparam = "function=call;number=" + cnt.BusinessTelephoneNumber.Replace(";", "").Replace(" ", "") + ";name=" + ((cnt.FileAs != null) ? cnt.FileAs.Replace(";", "").Replace(" ", "") : "Name Not Available");

                   try
                   {

                       string s = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
                       if (System.IO.Directory.Exists(s + "\\FPHoneData") && File.Exists(s + "\\FPHoneData\\fcon.dat"))
                       {

                           string file_name = System.IO.File.ReadAllText(s + "\\FPHoneData\\fcon.dat");
                           if (File.Exists(file_name))
                               System.Diagnostics.Process.Start(file_name, cmdparam);
                           else
                               System.Windows.Forms.MessageBox.Show("Application File Cannot be Found!\nPlease Reinstall the Application", "FPHone", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Warning);


                       }
                   }
                   catch
                   {
                   }

               }
               else
               {
                   System.Windows.Forms.MessageBox.Show("Business Telephone Number Not Found!");
               }

           }
       }