gridview 中更新按钮失效　急！！！
各位大侠帮帮忙，我使用模板里面有删除、修改、编辑、更新按钮，代码如下：

<asp:TemplateField   HeaderText= "操作 "   ShowHeader= "False "> <EditItemTemplate>
<asp:LinkButton   id= "LinkButton1 "   runat= "server "   Text= "更新 "   Width= "40px "   CausesValidation= "True "   CommandName= "Update "> </asp:LinkButton>   <asp:LinkButton   id= "LinkButton2 "   runat= "server "   Text= "取消 "   Width= "40px "   __designer:wfdid= "w14 "   CausesValidation= "False "   CommandName= "Cancel "> </asp:LinkButton>  
</EditItemTemplate>
<ItemTemplate>
<asp:LinkButton   id= "LinkButton1 "   runat= "server "   Text= "编辑 "   Width= "40px "   __designer:wfdid= "w11 "   CausesValidation= "False "   CommandName= "Edit "   OnClientClick= "return   confirm( '确认要编辑吗？ '); "> </asp:LinkButton>   <asp:LinkButton   id= "LinkButton3 "   runat= "server "   Text= "删除 "   Width= "40px "   __designer:wfdid= "w12 "   CausesValidation= "False "   CommandName= "Delete "   OnClientClick= "return   confirm( '确认要删除吗？ '); "> </asp:LinkButton>   </ItemTemplate>
</asp:TemplateField>
删除、编辑、取消按钮都可用，可是更新按钮不可用，也没有提示错误，也没有POSTBACK，请问这是什么原因呢？麻烦各位了！！

------解决方案--------------------
更新和编辑按钮的id一样？
------解决方案--------------------
帮顶吧，没看出来