关于加载多个用户控件

我的用户控件如下：<%@ Control Language="C#" AutoEventWireup="true" CodeFile="ReleaseMessage.ascx.cs" Inherits="selfControl_ReleaseMessage" %>
<style type="text/css">
    .style1
    {
        width: 273px;
    }
    .style2
    {
        height:10px;
        border-bottom:1px dashed gray;
    }
    a
    {
        text-decoration:none;
        font-family:Arial;
        font-size:smaller;
    }
    a:hover
    {
        text-decoration:underline;
        color:Navy;
        cursor:pointer;
    }
    #close
    {
        height: 23px;
    }
    .commet_txt
    {
        width:550px;
        margin-top:10px;
        margin-left:auto;
        margin-right:auto;
        display:none;   
    }
 </style>
 <script type="text/javascript">
     function ShowZFDiv() {
         var ShowZFDiv = document.getElementById("main_ref_container");
         ShowZFDiv.style.display = '';
         ShowZFDiv.style.left = "30%";
         ShowZFDiv.style.top = "30%";
         ShowZFDiv.style.zIndex = "2";
     }
     function closeDiv() {
         var closeDiv = document.getElementById("main_ref_container");
         closeDiv.style.display = 'none';
     }
     function showcommetDiv() {         var showcommetDiv = document.getElementById("commet_div");
         if (showcommetDiv.style.display == 'none')
             showcommetDiv.style.display = '';
         else
             showcommetDiv.style.display = 'none';
     }
 </script> <div id="self_ctrl_div" style="width:630px;background-color: #F4F4F4">
    <table width="630px"  >
        <tr><td><asp:Image ID="img_header" runat="server"  Height="60px" 
                Width="60px" ToolTip="头像"/></td>
            <td class="style1">
                <asp:Label ID="lbl_name" runat="server" Text="Label"></asp:Label>
                <asp:Label ID="lbl_user_id" runat="server" Text="Label"></asp:Label>
                <asp:Label ID="lbl_author_id" runat="server" Text="Label"></asp:Label>
                <asp:Label ID="lbl_amsgid" runat="server" Text="Label"></asp:Label>
                <asp:Label ID="lbl_authorname" runat="server" Text="Label"></asp:Label>
            </td>
            <td></td>
            <td></td>
            <td style="width:120px"><asp:Label ID="lbl_fabutime" runat="server" Text="显示发布日期"></asp:Label>
            </td></tr>
        <tr><td  rowspan="2"></td><td colspan="3">
            <asp:Label ID="lbl_content" runat="server"></asp:Label>
            </td><td rowspan="2"></td></tr>
        <tr><td colspan="3">
            <asp:Image ID="img_showpic" runat="server" Height="150px" Visible="False" />
            </td></tr>
        <tr><td></td><td class="style1"></td><td>
                <a id="a_zhuangfa" onclick="ShowZFDiv()">转发</a>
            </td><td>
                <a id="a_pinglun" onclick="showcommetDiv()">评论</a>
            </td><td>
                <a id="a_more" onclick="">更多</a>
            </td></tr>
        <tr><td class="style2" colspan="5">&nbsp;</td></tr>
    </table>
    <div id="commet_div" style="width:550px;margin-top:10px;margin-left:auto; margin-right:auto;display:none;">
        <div id="commet_txt">
        <asp:TextBox ID="TextBox2" runat="server" Rows="2" TextMode="MultiLine" Width="550px"></asp:TextBox><br />
        <span style="float:right; margin-top:10px"><button id="btn_submit_commet" value="评论">评论</button></span>
        </div> 
        <div id="commet_list">
            <a href="#" id="userphoto"><img src="" alt="" width="30px" height="30px" /></a>
            <a href="#" id="username">用户名</a>:<label id="commet_content"  title="评论内容">评论内容</label>
            <span id="respone_commet" style="display:block; float:right; margin:5px"><a onclick="">回 复</a></span>
        </div>
    </div>
</div><div id="main_ref_container" style=" width:400px; height:264px;position:fixed;display:none;background-color:#309fca; border:1px solid blue">
    <div id="close">
        <a  style=" background-position: 0px 0px; float:right;
            display:block; width: 35px; height: 19px; margin-top:5px; margin-right:5px; background-image: url('../image/close.jpg'); background-repeat: no-repeat; background-attachment: scroll;" 
            onclick="closeDiv()">关闭</a>       
        <label for="topicForwardType_84043" style="CURSOR: pointer"></label>
        <h2>转发微博</h2></div>
    <div id="ref_content" style=" width:90%; margin-left:auto; margin-right:auto">
    转发理由.....<br />
    <asp:TextBox ID="TextBox1" runat="server" TextMode="MultiLine" Height="163px" 
            Width="359px"></asp:TextBox>
    </div><br />
    <div id="ref_button" style=" width:90%; margin-left:auto; margin-right:auto">
        <div style="width:80%; float:right">
            <asp:CheckBox ID="CheckBox1" runat="server" Text="同时作为评论发布" />
            &nbsp;&nbsp;&nbsp;
            <asp:ImageButton ID="btn_zhuanfa" runat="server" ImageUrl="~/image/btn_ref.jpg" 
                Width="80px" onclick="btn_zhuanfa_Click" />
        </div>
    </div>
</div>aspx页面引用如下：
                  <uc1:ReleaseMessage ID="ReleaseMessage1" runat="server" />
                  <uc1:ReleaseMessage ID="ReleaseMessage2" runat="server" />
                  <uc1:ReleaseMessage ID="ReleaseMessage3" runat="server" />当点击评论链接是每次都是第一个用户控件弹出评论框     这是怎么回事  希望高手指点  多谢！