定时器为什么不能触发事件？-->待解决

        protected void Page_Load(object sender, EventArgs e)
        {
            System.Timers.Timer oTimer = new System.Timers.Timer(1000);
            oTimer.Elapsed += new System.Timers.ElapsedEventHandler(Button1_Click);
            oTimer.AutoReset = true;
            oTimer.Enabled = true;
        }
        /// <summary>
        /// 事件
        /// </summary>

        protected void Button1_Click(object sender, EventArgs e)
        {
            Response.Write("<script>alert('111')</script>");
        }

这个定时器为什么不能触发事件？