At some point, possibly after upgrading to version 16, my headers and footers disappeared. I've tried multiple things to no avail. Any help would be appreciated. Here is my very simple code, and before you ask, YES, the session variables are populated:

protected void btnExport_Click(object sender, EventArgs e)
{
//Render the current page to PDF
EO.Pdf.HtmlToPdf.Options.OutputArea = new RectangleF(0.5f, 0.5f, 7.5f, 10f);
EO.Pdf.HtmlToPdf.Options.AutoFitX = HtmlToPdfAutoFitMode.ShrinkToFit;
EO.Pdf.HtmlToPdf.Options.ZoomLevel = 0.7f;
EO.Pdf.HtmlToPdf.Options.PageSize = EO.Pdf.PdfPageSizes.A4;

if (Session["ReportHeader"] != null)
{
EO.Pdf.HtmlToPdf.Options.HeaderHtmlFormat = Session["ReportHeader"].ToString();
}

if (Session["ReportFooter"] != null)
{
EO.Pdf.HtmlToPdf.Options.FooterHtmlFormat = Session["ReportFooter"].ToString();
}

EO.Pdf.HtmlToPdf.Options.InvisibleElementIds = "non-printable;button-non-printable";
EO.Pdf.HtmlToPdf.Options.VisibleElementIds = "printable;pnlContent";
string filename = Session["ExportReportFileName"].ToString();
ASPXToPDF1.RenderAsPDF(filename);

Session["ReportHeader"] = null;
Session["ReportFooter"] = null;
}