datagrid e popup

[realbenny]

<asp:datagrid id="DataGrid2" style="Z-INDEX: 103; LEFT: 16px; POSITION: absolute; TOP: 104px"
				runat="server" Width="1072px" CssClass="corpotesto" BorderColor="#CC9966" BorderStyle="None"
				BorderWidth="1px" BackColor="White" CellPadding="4" AutoGenerateColumns="False" Height="192px">
				<FooterStyle ForeColor="#330099" BackColor="#FFFFCC"></FooterStyle>
				<SelectedItemStyle Font-Bold="True" ForeColor="#663399" BackColor="#FFCC66"></SelectedItemStyle>
				<ItemStyle ForeColor="#330099" BackColor="White"></ItemStyle>
				<HeaderStyle Font-Bold="True" ForeColor="#FFFFCC" BackColor="#990000"></HeaderStyle>
				<Columns>
					<asp:BoundColumn DataField="Codice" HeaderText="Codice"></asp:BoundColumn>
					<asp:BoundColumn DataField="Nome" HeaderText="Servizio"></asp:BoundColumn>
					<asp:BoundColumn DataField="Descrizione" HeaderText="Descrizione"></asp:BoundColumn>
					<asp:BoundColumn Visible="False" DataField="NomeGruppo" HeaderText="NomeGruppo"></asp:BoundColumn>
					<asp:BoundColumn Visible="False" DataField="DestinatarioDsi" HeaderText="DestinatarioDsi"></asp:BoundColumn>
					<asp:BoundColumn Visible="False" DataField="Costo" HeaderText="Costo unitario">
						<ItemStyle HorizontalAlign="Right"></ItemStyle>
					</asp:BoundColumn>
					<asp:BoundColumn DataField="OrarioServizio" HeaderText="Orario servizio">
						<ItemStyle HorizontalAlign="Center"></ItemStyle>
					</asp:BoundColumn>
					<asp:BoundColumn DataField="SupportoUtenza" HeaderText="Supporto utenza">
						<ItemStyle HorizontalAlign="Center"></ItemStyle>
					</asp:BoundColumn>
					<asp:BoundColumn DataField="Disponibilit&#224;" HeaderText="Disponibilit&#224;"></asp:BoundColumn>
					<asp:BoundColumn Visible="False" DataField="URL_Doc" HeaderText="URL_Doc"></asp:BoundColumn>
					<asp:HyperLinkColumn Target="_blank" DataNavigateUrlField="Descrizione" DataTextField="Descrizione" HeaderText="Descrizione"
						DataTextFormatString="Dettaglio"></asp:HyperLinkColumn>
					<asp:BoundColumn Visible="False" DataField="DataCreazione" HeaderText="Data Creazione" DataFormatString="{0:G}"></asp:BoundColumn>
					<asp:BoundColumn Visible="False" DataField="IsActive" HeaderText="IsActive"></asp:BoundColumn>
					<asp:BoundColumn Visible="False" DataField="ID_Gruppo_Servizi" HeaderText="ID_Gruppo_Servizi"></asp:BoundColumn>
					<asp:BoundColumn Visible="False" DataField="Totale" HeaderText="Prezzo Totale">
						<ItemStyle HorizontalAlign="Right"></ItemStyle>
					</asp:BoundColumn>
					<asp:TemplateColumn HeaderText="Quantit&#224;">
						<ItemStyle HorizontalAlign="Center"></ItemStyle>
						<ItemTemplate>
							<asp:TextBox id="txtQuantita" runat="server" Width="48px" CssClass="textbox">1</asp:TextBox>

							<asp:CustomValidator id="CustomValidator1" runat="server" ErrorMessage="Formato non numerico" ControlToValidate="txtQuantita"></asp:CustomValidator>
						</ItemTemplate>
					</asp:TemplateColumn>
					<asp:EditCommandColumn ButtonType="PushButton" UpdateText="Aggiorna" CancelText="Annulla" EditText="Aggiungi"></asp:EditCommandColumn>
				</Columns>
				<PagerStyle HorizontalAlign="Center" ForeColor="#330099" BackColor="#FFFFCC"></PagerStyle>
			</asp:datagrid>

ho questa datagrid, ho bisogno nella colonna del hyperlinkcolumn quando clicco sul link mi si apra un popup. come posso fare?