How to display Adomd datatable in datagrid with wpf and mvvm

See more:

ADO.NET

WPF

DataTable

MVVM

, +

Hello,
I am trying to display data from a mdx query in a datagrid with wpf and mvvm.
here is my xaml:

<DataGrid AutoGenerateColumns="True"
                   ItemsSource="{Binding ResultTable}"
                   Height="300"

                   MinWidth="600"
                   ScrollViewer.VerticalScrollBarVisibility="Auto"
                   ScrollViewer.CanContentScroll="True"></DataGrid>

My viewModel:

private DataTable _resultTable;

public DataTable ResultTable
{
     get { return _resultTable; }
     set
      {
         _resultTable = value;
         OnPropertyChanged(() => ResultTable);
      }
 }

 public void ToDataTable(string query)
 {
    DataSet DS = new DataSet();
    DataTable DT = null;
    AdomdDataAdapter DA;
    string tname = "T1";
    try
     {
       DA = new AdomdDataAdapter(query, Connection);
       DA.Fill(DS, tname);

       if (DS != null)
       {
         if (DS.Tables.Contains(tname))
         {
             ResultTable= DS.Tables[tname];
         }
        }
     }
     catch (AdomdException ex1)
         {
             DT = null;
             throw ex1;
         }
     catch (Exception ex)
         {
             DT = null;
             throw ex;
         }
     }

I get this exception :
System.Windows.Data Error: 17 : Cannot get 'Item[]' value (type 'Object') from '' (type 'DataRowView'). BindingExpression:Path=[Artículos].[Artículo].[Artículo].[MEMBER_CAPTION]; DataItem='DataRowView' (HashCode=57334574); target element is 'TextBlock' (Name=''); target property is 'Text' (type 'String') TargetInvocationException:'System.Reflection.TargetInvocationException: Se produjo una excepción en el destino de la invocación. ---> System.ArgumentException: Artículos no es DataColumn ni DataRelation para la tabla T1.
en System.Data.DataRowView.get_Item(String property)

And my query is :
SELECT NON EMPTY { [Measures].[%Importe] } ON COLUMNS ,
NON EMPTY { [Artículos].[Artículo].ALLMEMBERS * [Artículos].[Familia].ALLMEMBERS } DIMENSION PROPERTIES MEMBER_CAPTION, MEMBER_UNIQUE_NAME ON ROWS
FROM [Modelo] CELL PROPERTIES VALUE, BACK_COLOR, FORE_COLOR, FORMATTED_VALUE, FORMAT_STRING, FONT_NAME, FONT_SIZE, FONT_FLAGS

The result:
I show the one from my solution and the other from SqlServer2012 analysis services
Snapshot

What am I missing in the process? Any other way of displaying the data automatically?