Binding to nested array property

[dex]

Hi,

I'm using Silverlight, EF 4.1 and DomainServices

I have such a column in my Silverlight GridView:

<telerikGridView:GridViewDataColumn Header="Product" DataMemberBinding="{Binding Path=product.product_lang[0].name, Mode=TwoWay, ValidatesOnExceptions=True, NotifyOnValidationError=True, ValidatesOnDataErrors=True}" SortingState="Ascending" UniqueName="Product" IsReadOnly="True">

                                <telerikGridView:GridViewDataColumn.CellTemplate>
                                    <DataTemplate>
                                        <TextBlock Text="{Binding Path=product.product_lang[0].name}" />
                                    </DataTemplate>
                                </telerikGridView:GridViewDataColumn.CellTemplate>
                            </telerikGridView:GridViewDataColumn>

But it doesn't show data.

On another column I use Path=product.manufacturer.name which works well, so I think there is something wrong with my Path.
Path=product.product_lang.Count shows 1 also.

Can anyone help me please