Screen Shot

Please see the attached screen shot(sorry was unable to attach so uploaded on dropbox)

I want to change text of treeview node at runtime which has been circled in screen shot

I am using the code below to change it

TreeView1.Items[2].Item[6].Text:='Some Text';
But getting the error below

List index out of bound(6)

However the same code works if I change the text of any subitem of first item such as

TreeView1.Items[0].Item[1].Text:='Some Text';