[flexcoders] Unable to remove root Node in tree control

[qau_yasir]

Hi all!
I have following code to remove the nodes from the tree control.

            var children:XMLList = XMLList(targetTree.selectedItem); 
          
            delete children[0];

This works for all child nodes except root node of the tree.

Beside this problem, I drag data from  sourceTree to targetTree, On
targetTree How to append data to specific(selected)node.

Please help.

Thanks 
Regards
YM