开机运行读不了XML？？

   我写了个小闹钟程序，需要开机自动运行，读取
设定好的闹铃时间，并且 设定一个Label的Visible
属性，以作提示。
    每次双击运行都很正常，即能从XML中读出上次关闭
前设置的时间。
    问题就出在：电脑刚开机自动运行，就读不出XML里的信息
了！！有人说可能是刚开机Framework 里读取XML的相关DLL文件
可能还没加载，于是我在Timer 里做延时读取XML还是不行!          以下是下载地址，以及相关代码：
  http://d.namipan.com/d/2cee3be48bca52e76ee37028fb8f0d0f8eee7caad01a0700 
          private void timer1_Tick(object sender, EventArgs e)       
        {
            //this.lblShow.Text = DateTime.Now.ToLongTimeString();            this.lblShow.Text = DateTime.Now.ToString()
                               + Day[Convert.ToInt16(DateTime.Now.DayOfWeek)];
            if (this.TopMost == false)
            { this.TopMost = true; }
            flag++;
            if (flag == 20)
                ConfigMothod();        }
        private void ConfigMothod()
        {
            Config.ReadFormregedit();
            this.WinStartRuntoolStripMenuItem1.Checked = Config._RunOnWindowsStart;
            //这部分放在  Form1_Load(object sender, EventArgs e)里 在开机运行时，有点问题
            Config.ReadFormXml();
            if (Config._CanDo)
            {
                if (Config._RingTime < DateTime.Now)
                {
                    MessageBox.Show("您设置的闹铃已经过期！");
                    lblRing.Visible = false;
                    Config._CanDo = false;
                    timer2.Enabled = false;
                    Config.SaveToXml();
                }
                else
                {
                    lblRing.Visible = Config._CanDo;
                    timer2.Enabled = Config._CanDo;
                    Ring.dt = Config._RingTime;
                    Ring.Message = Config._Message;
                }
            }
            else
            {
                lblRing.Visible = Config._CanDo;
                timer2.Enabled = Config._CanDo;
            }
        }
  using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.IO;
using System.Reflection;
using System.Windows.Forms;
using Microsoft.Win32;
namespace lkfClock
{
    class Config
    {
        public static  bool _RunOnWindowsStart;
        public static bool _CanDo;
        public static String _Message;
        public static DateTime _RingTime;        public static void ReadFormregedit()
        {
             RegistryKey hklm = Registry.LocalMachine;//需要引用 Microsoft.Win32             RegistryKey run = hklm.CreateSubKey(@"Software\Microsoft\Windows\CurrentVersion\Run");
             try
             {
                 _RunOnWindowsStart = run.GetValue("lkfClock.exe") == null ? false : true;                 //hklm.Close();
             } //注意，一定要关闭，注册表应用。 
             catch (Exception my) //这是捕获异常的 
             {
                 MessageBox.Show(my.Message.ToString(), "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
             }
             finally
             {
                 if (hklm != null)
                 {
                     hklm.Close();
                 }
             }
        }
        public static void ReadFormXml()
        {
            XmlTextReader reader;
            if (File.Exists("ClockSet.xml"))
            {
                reader = new XmlTextReader("ClockSet.xml");
            }
            else
            {
                Assembly asm = Assembly.GetExecutingAssembly();
                Stream sm = asm.GetManifestResourceStream("lkfClock.ClockSet.xml");
                reader = new XmlTextReader(sm);
            }
            try
            {
                while (reader.Read())
                {
                    if (reader.NodeType == XmlNodeType.Element)
                    {
                        if (reader.Name == "CanDo")
                        { _CanDo = reader.ReadElementString().Trim() == "1" ? true : false; }
                        else if (reader.Name == "RingTime")
                        { _RingTime = Convert.ToDateTime(reader.ReadElementString().Trim()); }
                        else if (reader.Name == "Message")
                        { _Message = reader.ReadElementString().Trim(); }
                        
                    }
                }
            }
            catch (Exception ex)
            { MessageBox.Show(ex.ToString()); }
            finally
            {
                if (reader != null)
                    reader.Close();
            }
        }
        public static void SaveToXml()
        {
            XmlDataDocument doc = new XmlDataDocument();
            doc.LoadXml("<ColockSet></ColockSet>");
            XmlNode root = doc.SelectSingleNode("ColockSet");
            XmlElement xelRing = doc.CreateElement("Ring");
            XmlElement xelCanDo = doc.CreateElement("CanDo");
            XmlElement xelRingTime = doc.CreateElement("RingTime");
            XmlElement xelMessage = doc.CreateElement("Message");
            xelCanDo.InnerText = _CanDo == true ? "1" : "0";
            xelRingTime.InnerText = _RingTime.ToString();
            xelMessage.InnerText = _Message;
            xelRing.AppendChild(xelCanDo);
            xelRing.AppendChild(xelRingTime);
            xelRing.AppendChild(xelMessage);
            root.AppendChild(xelRing);            doc.Save("ClockSet.xml");
            
        }    }
}