RadBar chart series item label should be at top of bar

[Kishor]

hi

Iam using RadBar chart for WinForm .

i have set the property as
 chartSeries.Appearance.LabelAppearance.LabelLocation = StyleSeriesItemLabel.ItemLabelLocation.Outside.

but still it shows the series item label inside bar.

as shown in chart 
1  is wrong
2  is correct

even if the height of bar is 100 percent  I want it outside bar.

please help

thanks