为什么我使用微软的ajax控件不会实时的更新

[ec78888]

为什么我使用微软的ajax控件不会实时的更新，和是要按f5或者是刷新页面以后才会显示，不会一提示"你的信息发布成功"完就显示啊

前台是：

<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
  <asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<table border="0" cellpadding="0" cellspacing="0" width="936px">
<tr>
<td>
<table border="0" cellpadding="0" cellspacing="0" style="height: 165px" width="100%">
<tr>
<td background="images/bg001.gif" height="30">
<table align="center" border="0" cellpadding="0" cellspacing="0" width="90%">
<tr>
<td class="f13 bold" style="height: 18px" width="75%">
商家最新回复留言</td>
</tr>
</table>
</td>
</tr>
<tr>
<td style="height: 135px">
<table border="0" cellpadding="0" cellspacing="0" style="height: 115px" width="100%">
<asp:Repeater ID="Repeater4" runat="server">
<ItemTemplate>
<tr>
<td><table background="images/bg003.gif" border="0" cellpadding="0" cellspacing="0" height="100" width="100%">
<tr>
<td width="29%" style="height: 100px">
<table align="center" border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="center">
<%# Eval("Ly_Name")%></td>
</tr>
<tr><TD align=center><%# DateTime.Parse(Eval("Ly_AddTime").ToString()).ToString("yyyy/MM/dd")%></TD></tr>
</table>
</td>
<td style="height: 100px" width="71%" >
<table align="left" border="0" cellpadding="0" cellspacing="0" width="85%">
<tbody>
<tr>
<td>
<%# Eval("Ly_Content") %></td>
</tr>
<tr>
<td class="orange">
<%# Eval("Ly_Respeak").ToString() == "0" ? "" : "店家回复：" + Eval("Ly_Respeak")%>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</table>
</td>
</tr>
</ItemTemplate>
</asp:Repeater>
</table>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td valign="top">
<table align="center" border="0" cellpadding="0" cellspacing="3" width="330">
<tr>
<td width="19">
 </td>
<td align="left" width="250">
  <asp:TextBox ID="Ly_Name" runat="server" Width="158px"></asp:TextBox></td>
<td width="309">
 <asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="True" OnCheckedChanged="CheckBox1_CheckedChanged"
Text="匿名发布" />
</td>
</tr>
<tr>
<td>
 </td>
<td colspan="2">
 <asp:TextBox ID="Ly_Content" runat="server" Rows="6" TextMode="MultiLine" Width="300px"></asp:TextBox></td>
</tr>
<tr>
<td>
 </td>
<td colspan="2">
<label>
<asp:Button ID="Button1" runat="server" Text="留　言" OnClick="Button1_Click" /> </label><label style="text-align: left">
</label>
</td>
</tr>
</table>
</td>
</tr>
</table>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />
</Triggers>
</asp:UpdatePanel>

后台：

protected void Button1_Click(object sender, EventArgs e)
{
string sql = "Insert Into Shop_Ly (Ly_Name,Ly_Content,Ly_AddTime,Ly_ID)Values(@Ly_Name,@Ly_Content,@Ly_AddTime,@Ly_ID)";
SqlCommand comm = new SqlCommand(sql, conn.conn_sjklj());
comm.Parameters.Add("@Ly_Name", SqlDbType.Char).Value = Ly_Name.Text.ToString().Trim();
comm.Parameters.Add("@Ly_Content", SqlDbType.NText).Value = Ly_Content.Text.ToString().Trim();
comm.Parameters.Add("@Ly_AddTime", SqlDbType.DateTime).Value = DateTime.Now;
comm.Parameters.Add("@Ly_ID", SqlDbType.Int).Value = Request.QueryString["s"].ToString().Trim();
comm.ExecuteNonQuery();
conn.conn_sjklj().Close();
ScriptManager.RegisterClientScriptBlock(UpdatePanel1, typeof(UpdatePanel), "alertok", "alert('留言成功！');", true);
}


望各位.net同行帮忙看一下，在这里先谢了！！！
在线等待，急！！！

[满衣兄]

看的我想吐了。。。太长。。。

[BernardSun]

Button1_Click最后加
UpdatePanel1.Update();