DevExpress XtraReport HtmlItemCreated event not raised

Question

I'm using DevExpress 2012 Vol 2.4 ASP.NET WebForms controls. I've created a new object of XtraReport class and subscribed to its HtmlItemCreated event. When I'm calling the ExportToHtml method of the XtraReport object the event is not getting raised.

I've not posted the markup but there is just a button. When I click the button the event is not triggered. I've put a breakpoint and tested that.

public partial class WebForm1 : System.Web.UI.Page
{
    XtraReport rep = null;

    protected void Page_Load(object sender, EventArgs e)
    {
        rep = new XtraReport();
        rep.CreateDocument();

        rep.HtmlItemCreated += rep_HtmlItemCreated;

        PageHeaderBand h = new PageHeaderBand();

        XRLabel l = new XRLabel();
        l.Text = "asdasd";

        h.Controls.Add(l);

        rep.Bands.Add(h);
    }

    protected void rep_HtmlItemCreated(object sender, HtmlEventArgs e)
    {
        if (e.ScriptContainer != null)
        {
            string x = "asdasd";
        }
    }

    protected void btnTest_Click(object sender, EventArgs e)
    {
        string sPDFFilePath = System.IO.Path.GetTempPath() + "Test.html";
        HtmlExportOptions objPDFExpOpt = rep.ExportOptions.Html;
        objPDFExpOpt.EmbedImagesInHTML = true;
        objPDFExpOpt.ExportMode = HtmlExportMode.DifferentFiles;
        if (!string.IsNullOrEmpty("Test"))
            objPDFExpOpt.Title = "Test";
        rep.ExportToHtml(sPDFFilePath, objPDFExpOpt);
    }
}