[flexcomponents] ADG firstVisibleItem

[vin.flex]

HI,


   I have an ADG with piechart as he itemrenderer for the entire row. 
If I click any node the chart is shown. 

  I want to set the opened node as the firstVisibleItem, so that 
the chart is visible completely. I am doing the following in itemOpen event.

myADG.fisrtVisibleItem = evt.item; 

This is not working everytime. Can anybody give sugggestions or other way to 
achieve this functionality.


thanks
vin