รัน ASP.Net vb บน IIS แล้วขึ้นเออเร่อ TTP Error 500.23 - Internal Server Error. An ASP.NET setting has been detected that does not apply in Integrated

<system.webServer>
  <validation validateIntegratedModeConfiguration="false" />
</system.webServer>

<asp:Repeater ID="Repeater2" OnItemCommand ="Repeater2_ItemCommand"  runat="server">

<asp:Repeater ID="Repeater2" OnItemCommand ="Repeater2_ItemCommand"  runat="server">
        <ItemTemplate >
              <asp:Button ID="btn_delimg" CssClass ="btn btn-success btn-xs" CommandName ="btn_delgallery" CommandArgument='<%#  Eval("dir_gallery") %>' runat="server" Text="ลบรูปภาพ"  />
        </ItemTemplate>
    </asp:Repeater>
    <asp:Label ID="Label1" runat="server"  Text ="label1"  ></asp:Label>

Private Sub Repeater2_ItemCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.RepeaterCommandEventArgs) Handles Repeater2.ItemCommand

        If e.CommandName = "btn_delgallery" Then
            Dim CustomerID As String = Convert.ToString(e.CommandArgument)
            Label1.Text &= CustomerID
        End If

    End Sub