Login popup not mapped or detected

Here's sample code to click on the TestComplete Dialogs Sample

function DlgTest()
{
    Browsers.Item(btChrome).Run("http://secure.smartbearsoftware.com/samples/testcomplete15/dialogs/");
    var page = Sys.Browser("chrome").Page("http://secure.smartbearsoftware.com/*");

    // Prompt sample
    var btn2 = page.Panel("page").Panel("dialogBox").Link(1);
    btn2.Click();
    Log.Message(page.Prompt().Message);
    aqObject.CheckProperty(page.Prompt(), "Message", cmpEqual, "Please enter your name");
    page.Prompt.TextBox("Value").SetText("SmartBear");
    Sys.HighlightObject(page.Prompt().Button("Cancel"));
    page.Prompt().Button("OK").Click()
}