Once again about treeview in ASP

[Olga]

Hi guys,
I want to use Microsoft treeview control (no other) in my asp page and fill
it with parent-child information from datatable.
I draged and dropped treeview object from toolbox ty my page and then tryied
to add some nodes.
TreeView.Nodes.Add ..... didin't work and gave me "Object regueired" error.
Any advise pls
Thanks
Olga