Addind a 2nd series in MS Charts

Hi,

I use a chart with a SqlDataSource and it's working very nice :

<asp:Chart ID="Chart2" runat="server" DataSourceID="SqlDataSource2" Width="600px">
                                <BorderSkin SkinStyle="Raised" />
                                <Series>
                                    <asp:Series Name="Test" XValueMember="DAY" YValueMembers="TOTAL"
  ...