求助：VS2005做ASPX页面，可以插入数据，但不能更新和删除

本人初学者，请教各位达人，希望热心相助，先谢啦！！近期用VS 2005+sql server2005 做动态网站，DetailsView可以插入数据到数据库，点编辑后可以进入更新页面，修改数据点更新后，刷新网页，但是没有将数据更新到数据库，点删除也是只更新页面不删除数据。把页面代码贴在下面，请求达人看看是什么问题：<%@ Page Language="VB" MasterPageFile="~/MasterPage3.master" AutoEventWireup="false" CodeFile="admin.aspx.vb" Inherits="HTML_yhsh" title="未标题-1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <table width="1024">
        <tr>
            <td colspan="3" style="height: 202px" >
                <asp:Image ID="Image1" runat="server" ImageUrl="~/Image/yh_ba.jpg" /></td>
        </tr>
    </table>
    <table border="0" cellpadding="0" cellspacing="0" bgcolor="#ffffff"  style="color: #ffffff" width="1024">
        <tr>
            <td style="height: 32px; background-color: #000000; vertical-align: top; text-align: center;" colspan="2" rowspan="3">
                <table width="100%">
                    <tr>
                        <td style="HEIGHT: 252px">
                            <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConflictDetection="CompareAllValues"
                                ConnectionString="<%$ ConnectionStrings:E:\HRWEB\APP_DATA\ASPNETDB.MDFConnectionString10 %>"
                                DeleteCommand="DELETE FROM [WebNews] WHERE [news_ID] = @original_news_ID AND [news_Name] = @original_news_Name AND [news_From] = @original_news_From AND [news_Eidt] = @original_news_Eidt AND [news_Text] = @original_news_Text AND [news_Class] = @original_news_Class AND [news_time] = @original_news_time"
                                InsertCommand="INSERT INTO [WebNews] ([news_Name], [news_From], [news_Eidt], [news_Text], [news_Class], [news_time]) VALUES (@news_Name, @news_From, @news_Eidt, @news_Text, @news_Class, @news_time)"
                                OldValuesParameterFormatString="original_{0}" SelectCommand="SELECT * FROM [WebNews]"
                                UpdateCommand="UPDATE [WebNews] SET [news_Name] = @news_Name, [news_From] = @news_From, [news_Eidt] = @news_Eidt, [news_Text] = @news_Text, [news_Class] = @news_Class, [news_time] = @news_time WHERE [news_ID] = @original_news_ID AND [news_Name] = @original_news_Name AND [news_From] = @original_news_From AND [news_Eidt] = @original_news_Eidt AND [news_Text] = @original_news_Text AND [news_Class] = @original_news_Class AND [news_time] = @original_news_time">
                                <DeleteParameters>
                                    <asp:Parameter Name="original_news_ID" Type="Int32" />
                                    <asp:Parameter Name="original_news_Name" Type="String" />
                                    <asp:Parameter Name="original_news_From" Type="String" />
                                    <asp:Parameter Name="original_news_Eidt" Type="String" />
                                    <asp:Parameter Name="original_news_Text" Type="String" />
                                    <asp:Parameter Name="original_news_Class" Type="String" />
                                    <asp:Parameter Name="original_news_time" Type="DateTime" />
                                </DeleteParameters>
                                <UpdateParameters>
                                    <asp:Parameter Name="news_Name" Type="String" />
                                    <asp:Parameter Name="news_From" Type="String" />
                                    <asp:Parameter Name="news_Eidt" Type="String" />
                                    <asp:Parameter Name="news_Text" Type="String" />
                                    <asp:Parameter Name="news_Class" Type="String" />
                                    <asp:Parameter Name="news_time" Type="DateTime" />
                                    <asp:Parameter Name="original_news_ID" Type="Int32" />
                                    <asp:Parameter Name="original_news_Name" Type="String" />
                                    <asp:Parameter Name="original_news_From" Type="String" />
                                    <asp:Parameter Name="original_news_Eidt" Type="String" />
                                    <asp:Parameter Name="original_news_Text" Type="String" />
                                    <asp:Parameter Name="original_news_Class" Type="String" />
                                    <asp:Parameter Name="original_news_time" Type="DateTime" />
                                </UpdateParameters>
                                <InsertParameters>
                                    <asp:Parameter Name="news_Name" Type="String" />
                                    <asp:Parameter Name="news_From" Type="String" />
                                    <asp:Parameter Name="news_Eidt" Type="String" />
                                    <asp:Parameter Name="news_Text" Type="String" />
                                    <asp:Parameter Name="news_Class" Type="String" />
                                    <asp:Parameter Name="news_time" Type="DateTime" />
                                </InsertParameters>
                            </asp:SqlDataSource>
                            <asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False" DataKeyNames="news_ID"
                                DataSourceID="SqlDataSource1" Height="50px" Width="125px">
                                <Fields>
                                    <asp:BoundField DataField="news_ID" HeaderText="news_ID" InsertVisible="False" ReadOnly="True"
                                        SortExpression="news_ID" />
                                    <asp:BoundField DataField="news_Name" HeaderText="news_Name" SortExpression="news_Name" />
                                    <asp:BoundField DataField="news_From" HeaderText="news_From" SortExpression="news_From" />
                                    <asp:BoundField DataField="news_Eidt" HeaderText="news_Eidt" SortExpression="news_Eidt" />
                                    <asp:BoundField DataField="news_Text" HeaderText="news_Text" SortExpression="news_Text" />
                                    <asp:BoundField DataField="news_Class" HeaderText="news_Class" SortExpression="news_Class" />
                                    <asp:BoundField DataField="news_time" HeaderText="news_time" SortExpression="news_time" />
                                    <asp:CommandField ShowDeleteButton="True" ShowEditButton="True" ShowInsertButton="True" />
                                </Fields>
                            </asp:DetailsView>
                            <asp:ObjectDataSource ID="ObjectDataSource1" runat="server"></asp:ObjectDataSource>
                            &nbsp; &nbsp; &nbsp;
                            &nbsp; &nbsp; &nbsp;
                            &nbsp;&nbsp;
                        </td>
                    </tr>
                </table>
                &nbsp; &nbsp;
                &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;</td>
        </tr>
        <tr>
        </tr>
        <tr>
        </tr>
    </table>
</asp:Content>