problem on word template in asp.net

public static bool WriteInfoToWordDoc(object fileName, Dictionary<string, object> data)
        {
            bool result = false;
            object missing = System.Reflection.Missing.Value;

            // setup Word.Application class.
            Microsoft.Office.Interop.Word.Application wordApp = new Microsoft.Office.Interop.Word.Application();

            // setup Word.Document class we'll use
            Microsoft.Office.Interop.Word.Document wordDoc = null;

            object readOnly = false;
            object isVisible = false;

            try
            {
                // set word to be not visible
                wordApp.Visible = false;

                // open the word document
                wordDoc = wordApp.Documents.Open(ref fileName, ref missing, ref readOnly, ref missing, ref missing,
                    ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref isVisible, ref missing,
                    ref missing, ref missing);
                // activate the document
                wordDoc.Activate();
                
                foreach (string key in data.Keys)
                {
                    WriteData(wordApp, key, data[key]);
                }

                // save the document to correct destination
                wordDoc.SaveAs(ref fileName, ref missing, ref missing, ref missing, ref missing, ref missing,
                    ref missing, ref missing, ref missing, ref missing, ref missing,
                    ref missing, ref missing, ref missing, ref missing, ref missing);

                // close the document
                wordDoc.Close(ref missing, ref missing, ref missing);
                result = true;
            }
            catch (Exception ex)
            {
                // nothing!
            }

            return result;
        }
private static bool WriteData(Microsoft.Office.Interop.Word.Application wordApp, string key, object value)
        {
            bool bResult = false;

            if (value != null)
            {
                string searchPattern = string.Format("#{0}#", key);
                bResult = FindAndReplace(wordApp, searchPattern, value);
            }

            return bResult;
        }

        private static bool FindAndReplace(Microsoft.Office.Interop.Word.Application wordApp, object findText, object replaceWithText)
        {
            bool result = false;
            object matchCase = true;
            object matchWholeWord = true;
            object matchWildCards = false;
            object matchSoundsLike = false;
            object matchAllwordForms = false;
            object forward = true;
            object format = false;
            object matchKashida = false;
            object matchDiacritics = false;
            object matchAlefHamza = false;
            object matchControl = false;
            object readOnly = false;
            object visible = true;
            object replace = 2;
            object wrap = 1;
            result = wordApp.Selection.Find.Execute(ref findText, ref matchCase, ref matchWholeWord, ref matchWildCards, ref matchSoundsLike, ref matchAllwordForms,
                ref forward, ref wrap, ref format, ref replaceWithText, ref replace, ref matchKashida, ref matchDiacritics, ref matchAlefHamza,
                ref matchControl);
            return result;
        }
// how i use this functionality
 string map = Server.MapPath(".");
                string path = map + "/Files/" + ContractTypesRow.ContractTypeRowID + ".docx";
                string FileName = map + "/Files/" + ContractsRow.ContractRowID + ".docx";
                string FileName2 = "Files/" + ContractsRow.ContractRowID + ".docx";
                bool res = Classes.WordInterop.SaveFile(path, ContractTypesRow.ContractTypeWordTemplateContent,this.Page);
                bool res2 = Classes.WordInterop.SaveFile(FileName, ContractTypesRow.ContractTypeWordTemplateContent,this.Page);
                if (res && res2)
                {
                    res = Classes.WordInterop.WriteInfoToWordDoc(FileName, data);
                    if (res)
                    {
                        System.Text.StringBuilder sb = new System.Text.StringBuilder();
                        sb.Append("<script type='text/javascript'>"); ;
                        sb.Append("window.open('" + FileName2 + "','_blank');");
                        sb.Append("</script>");
                        if (!ClientScript.IsStartupScriptRegistered("JSScript"))
                        {
                            ClientScript.RegisterStartupScript(this.GetType(), "JSScript", sb.ToString());
                        }
                    }
                }