关于DBChart的问题，着急呀！！！！

我要在一个DBChart上动态现实多条线，但是动态增加了几个Series以后，可是线段的Y轴总是显示的是最后增加的高度，怎么回事呀？大哥们帮帮忙！
self.DBChart1.SeriesList.Clear;
        for i:=0 to self.CLBT_Code.Items.Count - 1 do
        begin            Series:=TLineSeries.Create(Application);
            self.DBChart1.AddSeries(series);
            if self.CLBT_Code.Checked[i] then
            begin
                ADOQuery3.Close;
                ADOQuery3.SQL.Clear;
                ADOQuery3.SQL.Add('select Sum(W_Site) as SDSW,' +
                            'Substring(Convert(char(19),In_Date,120),9,8)
                             as SD from Water_Site  where t_code='
                            LeftStr(CLBT_Code.Items[i],3) +
                            ' and In_Date between ''' + FormatDateTime
                            ('yyyy-mm-dd',B_Date) + ' 00:00:00'  +
                           ''' and ''' + FormatDateTime('yyyy-mm-                            dd',IncDay(E_Date)) + ' 00:00:00'''+
                            ' Group by In_Date Order by In_Date' );                ADOQuery3.Open;
                Series.DataSource:=ADOQuery3;
                Series.XLabelsSource:='SD';
                Series.YValues.ValueSource:='SDSW';
                series.RefreshSeries;            end;
            DBChart1.RefreshData;
        end;