iTextSharp PDF generating problem

protected void Button1_Click(object sender, EventArgs e)
    {
          string myString;
          myString =Page_ARABIC();
            
          string attachment = "attachment; filename=Simple.pdf";
          Response.ClearContent();
          Response.AddHeader("content-disposition", attachment);
          Response.ContentType = "application/pdf";

          iTextSharp.text.Document document = new iTextSharp.text.Document();
          PdfWriter.GetInstance(document, Response.OutputStream);
          document.Open();

          StringReader str = new StringReader(myString);
          HTMLWorker htmlworker = new HTMLWorker(document);
          htmlworker.Parse(str);
            
          document.Close();
          Response.Write(document);
          Response.End();
}


    public String Page_ARABIC()
    {

       

        String strTable = "";
        strTable = strTable + " <table width="100%" charset="Windows-1256" dir="rtl"> ";
        strTable = strTable + " <tr> ";
        strTable = strTable + "  <td align="center" colspan="4"> ";
        strTable = strTable + "  <table border="0" cellpadding="0" cellspacing="0" width="100%"> ";
        strTable = strTable + "  <tr> ";
        strTable = strTable + "  <td width="20%"> ";
        strTable = strTable + "  </td> ";
        strTable = strTable + "  <td width="60%"> ";
        strTable = strTable + "  <img height='100' src='" + Path + "' ";
        strTable = strTable + "  width='300' /></td> ";
        strTable = strTable + "  <td width="20%"> ";
        strTable = strTable + "  </td> ";
        strTable = strTable + "  </tr> ";
        strTable = strTable + "  </table> ";
        strTable = strTable + "  </td> ";
        strTable = strTable + "  </tr> ";
        strTable = strTable + "  <tr> ";
        strTable = strTable + "  <td align="center" colspan="4"> ";
        strTable = strTable + "  <span style="color: #1f497d; font-family: Garamond; font-size: 16pt;">  منتصف السنة نموذج تقييم الأداء</span> ";
        strTable = strTable + "  </td> ";
        strTable = strTable + "  </tr> ";
        strTable = strTable + "  <tr> ";
        strTable = strTable + "  <td align="center" colspan="4" style="height: 21px"> ";
        strTable = strTable + "  <span style="text-align: center; text-decoration: underline">    <span style="font-size: 14pt"> ";
        strTable = strTable + "  <span style="color: #1f497d"><span style="font-family: Garamond">المادة 1: تفاصيل مهمة<o:p xmlns:o="#unknown"></o:p></span></span></span></span></td> ";
        strTable = strTable + " </tr></table> ";

        return strTable;
    }