title: Radio button in Gridcolumn won't trigger binding
body: <p>I have two devexpress gridcolumns with one radio button in each.</p>
  
  <p>In code behind when I am setting a value to the properties binding to the radio button, the binding takes. But when I am changing selected radio button in the view the selected won't trigger the property.</p>
  
  <p>what am I missing?</p>
  
  <pre><code>&lt;dxg:GridColumn Binding="{Binding IsOrder}"
                        Header="Order" 
                        Visible="{Binding IsVisible}"
                        Width="60"&gt;
    &lt;dxg:GridColumn.CellTemplate&gt;
          &lt;DataTemplate&gt;
              &lt;RadioButton IsChecked="{Binding Path=Value, Mode=TwoWay}"
                           GroupName="{Binding RowData.Row.Number}"
                           VerticalAlignment="Center"
                           HorizontalAlignment="Center"
                          IsEnabled="{Binding 
                                 Path=View.DataContext.StatusNotHandled}"/&gt;
         &lt;/DataTemplate&gt;
  &lt;/dxg:GridColumn.CellTemplate&gt;
  </code></pre>
  
  <p></p>
  
  <pre><code>&lt;dxg:GridColumn Binding="{Binding IsNotOrder}"
                        Header="Not order" 
                        Visible="{Binding IsVisible}"
                        Width="60"&gt;
    &lt;dxg:GridColumn.CellTemplate&gt;
          &lt;DataTemplate&gt;
              &lt;RadioButton IsChecked="{Binding Path=Value, Mode=TwoWay}"
                           GroupName="{Binding RowData.Row.Number}"
                           VerticalAlignment="Center"
                           HorizontalAlignment="Center"
                          IsEnabled="{Binding 
                                  Path=View.DataContext.StatusNotHandled}"/&gt;
         &lt;/DataTemplate&gt;
  &lt;/dxg:GridColumn.CellTemplate&gt;
  </code></pre>
  
  <p></p>