How to handle Windows Authentication in Telerik Test Studio?

Our developers add Windows Authentication in our Silverlight Login Page. In my local machine, when I launch the Silverlight Application, no Windows Authentication popup appears. If I login to another machine, the Windows Authentication popup appears and using my username and password to login is required.

How to I handle Silverlight UI Automation via Telerik Test Studio? After doing some research, I use the following code to handle this scenario in IE 8 successfully.

var windowsAuth = LogonDialog.CreateLogonDialog(ActiveBrowser, "UserName","Password", DialogButton.OK);
Manager.DialogMonitor.AddDialog(windowsAuth);