AdvancedDataGrid & selectedItem, как получить item

[chaos]

не работает валится на

var data:Object = event.currentTarget.dataProvider[event.rowIndex];

вот такой исходный код у мну

 
[Bindable]
private var d:ArrayCollection = new ArrayCollection;
 
private function onCreationComplete():void {
	var o:Object = new Object();
	o.name = "Group1";
	o.children = new ArrayCollection;
	o.children.addItem({name:"Item 1", field1:"hello", field2:"world"});
	o.children.addItem({name:"Item 2", field1:"hello", field2:"world"});
	o.children.addItem({name:"Item 3", field1:"hello", field2:"world"});
	d.addItem(o);
 
	o = new Object();
	o.name = "Group2";
	o.children = new ArrayCollection;
	o.children.addItem({name:"Item 1", field1:"hello", field2:"world"});
	o.children.addItem({name:"Item 2", field1:"hello", field2:"world"});
	o.children.addItem({name:"Item 3", field1:"hello", field2:"world"});
	d.addItem(o);			
 
	o = new Object();
	o.name = "Group3";
	o.children = new ArrayCollection;
	o.children.addItem({name:"Item 1", field1:"hello", field2:"world"});
	o.children.addItem({name:"Item 2", field1:"hello", field2:"world"});
	o.children.addItem({name:"Item 3", field1:"hello", field2:"world"});
	d.addItem(o);
 
	o = new Object();
	o.name = "Group4";
	o.children = new ArrayCollection;
	o.children.addItem({name:"Item 1", field1:"hello", field2:"world"});
	o.children.addItem({name:"Item 2", field1:"hello", field2:"world"});
	o.children.addItem({name:"Item 3", field1:"hello", field2:"world"});
	d.addItem(o);			
}
 
<mx:AdvancedDataGrid x="134" y="108" id="adg1" designViewDataType="tree" width="739" height="216"
		dragEnabled="true" dropEnabled="true"
		dragOver="dragStrat(event)"
		selectionMode="singleCell"
		change="change(event);">
	<mx:dataProvider>
		<mx:HierarchicalData source="{d}" childrenField="children"/>
	</mx:dataProvider>
 
	<mx:columns>
		<mx:AdvancedDataGridColumn headerText="Column 1" dataField="name"/>
		<mx:AdvancedDataGridColumn headerText="Column 1" dataField="field1"/>
		<mx:AdvancedDataGridColumn headerText="Column 1" dataField="field2"/>
	</mx:columns>
</mx:AdvancedDataGrid>