We have used Telerik controls for ASP.NET AJAX on our email verification ASP.Net application running on Windows server 2008 with IIS 8 in implementing a progress bar which shows the progress of emails verified. However, we have observed that when the application is run via the local host ( http://localhost/appplication.aspx) the progress bar always displays. However, when we run the application through the URL (http://111.222.333.444/application.aspx), the progress bar do not appear. Please kindly look into this.