WPF GridControl dynamic row color

Hi,

I am trying to apply functionality to dynamically change grid's row color.
Went through a number of examples, and… I can't get it to work.

Program runs into converter, returns a brush, but row's color remains unchanged. I use Office2010Silver theme.

Could you point what I made wrong?

Here is converter code:

C#
class ItemTypeToColorConverter : IValueConverter  
    {  

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)  
        {  
            if (targetType.Name != typeof(Brush).Name)  
            {  
                throw new InvalidOperationException("ItemTypeToColorConverter: TargetType must be a Brush.");  
            }  

            Brush b = Brushes.Blue;  

            if (((DataRowView)value)== null) return Brushes.White;  

            switch(((DataRowView)value).Row.Field<string>("rodzaj_poz"))  
            {  
                case "L":  
                    b = Brushes.Red;  
                    break;  
                case "D":  
                    b = Brushes.RoyalBlue;  
                    break;  
                default:  
                    b = Brushes.White;  
                    break;  
            }  

            return b;  
        }  

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)  
        {  
            throw new NotImplementedException();  
        }  
    }  

And XAML:

XAML
<dxg:GridControl.View>  
 <dxg:TableView MultiSelectMode="Row" NavigationStyle="Row" ShowGroupPanel="True" >  
 <dxg:TableView.RowStyle>  
        <Style TargetType="{x:Type dxg:GridRowContent}" BasedOn="{StaticResource {dxgt:GridRowThemeKey ResourceKey=RowStyle, ThemeName=Office2010Silver, IsThemeIndependent=True}}">  
    <Setter Property="Background" Value="{Binding Path=Row, Converter={StaticResource ResourceKey=ItemTypeToColor}}" />        </Style>  
    </dxg:TableView.RowStyle>  
</dxg:TableView>  
 </dxg:GridControl.View>  

I would appreciate any hint.

Best regards,
Radek

XAML