传真 发布 问题

我前几天做了个传真软件 做完了再VS里运行没问题 发布了以后 通过IIS 访问网站 功能就不好用。也不报错。大家帮下忙告诉这是为什么
下面是代码protected void SendBut_Click(object sender, EventArgs e)
        {
            ExpertControl(this, DocumentType.Word, Server.MapPath("result.doc"), this.DocumentName.Text, this.RecipientName.Text, this.FileNumber.Text);
        }        public void ExpertControl(System.Web.UI.Control source, DocumentType type, string File, string FileTittle, string ReceiverName, string FaxNumber)
        {
            //设置Http的头信息,编码格式
            if (type == DocumentType.Excel)
            {
                //Excel
                Response.AppendHeader("Content-Disposition", "attachment;filename=result.xls");
                Response.ContentType = "application/ms-excel";
            }
            else if (type == DocumentType.Word)
            {
                //Word
                // Response.AppendHeader("Content-Disposition", "attachment;filename=result.doc");
                Response.ContentType = "application/ms-word";
            }
            Response.Charset = "utf-8";
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
            //关闭控件的视图状态
            source.Page.EnableViewState = false;
            //初始化HtmlWriter
            System.IO.StringWriter writer = new System.IO.StringWriter();
            System.Web.UI.HtmlTextWriter htmlWriter = new System.Web.UI.HtmlTextWriter(writer);            source.RenderControl(htmlWriter);
            ////////////houjia///////////////            StreamWriter streamwriter = new StreamWriter(File);                      //创建数据流
            streamwriter.Write(writer.ToString());                                   //输出
            streamwriter.Close();                                                    //关闭流
            SendFaxMessage(File, FileTittle, ReceiverName, FaxNumber);
            
            //输出
            // Response.Write(writer.ToString());
            Response.End();
        }
        //文档类型枚举
        public enum DocumentType
        {
            Word,
            Excel
        }
        // Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }
        /**/
        /// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.SendBut.Click += new System.EventHandler(this.SendBut_Click);
            this.Load += new System.EventHandler(this.Page_Load);
        }        /// <summary>
        /// 传真发送
        /// </summary>
        /// <param name="FileMessage">文件内容</param>
        /// <param name="FileTittle">文档名</param>
        /// <param name="ReceiverName">收件人姓名或者收件人公司名</param>
        /// <param name="FaxNumber">收件人传真号码</param>
        public void SendFaxMessage(string FileInfoMessage, string FileTittle, string ReceiverName, string FaxNumber)
        {
            if (FaxNumber != "")
            {                try
                {                    FAXCOMLib.FaxServer faxServer = new FAXCOMLib.FaxServerClass();         //初始化传真组件
                    faxServer.Connect(Environment.MachineName);                             //获取当前服务器名
                    FAXCOMLib.FaxDoc faxDoc = (FAXCOMLib.FaxDoc)faxServer.CreateDocument(FileInfoMessage);
                    faxDoc.RecipientName = ReceiverName;                                    //收件人姓名或者公司名
                    faxDoc.FaxNumber = FaxNumber;                                           //收件人传真号码
                    faxDoc.DisplayName = FileTittle;                                        //文档名
                    int Response = faxDoc.Send();                                           //程序到fax server的流水號
                    faxServer.Disconnect();                }
                catch (Exception Ex)
                {
                    Ex.ToString();
                }            }
        }