Item labels and tooltip visibility

[Cristian]

Hi Guys.
Im new to silverlight development, I'm working with radchart of radcontrol for silverlight q1 2012.
I want to make labels  of each series invisible and instead add a tooltip with information related to
each serie.
Here's how I create the chart.
 
<telerik:RadChart Name="grafica" >

 

                           <telerik:RadChart.DefaultView>

                               <telerik:ChartDefaultView>

                                    

                                   

                               </telerik:ChartDefaultView>

                           </telerik:RadChart.DefaultView>

 

 

                       </telerik:RadChart>


And here's how I bind the chart in code behind.

var serie2 = new DataSeries();
var barSerie= new DataSeries();

  grafica.DefaultSeriesDefinition.ShowItemLabels = false;
            grafica.DefaultSeriesDefinition.ShowItemToolTips = true;
            grafica.DefaultView.ChartArea.SmartLabelsEnabled = false;
            grafica.DefaultSeriesDefinition.ShowItemLabels = false;
   foreach (var proyEstrategico in x)
            {
                barSerie.Add(new DataPoint(proyEstrategico.ContribucionReal));
                serie2.Add(new DataPoint( proyEstrategico.ContribucionTeorica));



            }


            grafica.DefaultView.ChartArea.DataSeries.Add(serie2);
            grafica.DefaultView.ChartArea.DataSeries.Add(barSerie);

Binding the data works perfect but labels are invisible only when data is equal to 0 and I want them
always invisible and add tooltips.

How can I solve this?
Hope your Help.

Thanks.