How to select Treeview Child nodes particular only

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C#

C#4.0

Hi This is Ramesh,

I have treeview with database is binding fine with check boxes.
In this treeview 9 Nodes are there and lot of child nodes are there.
In my project I am created a roles and at a time i am assigned the nodes and child nodes.

Ex:-

Manager is there This role I am assigned following

Node: Security
Child: Assign Role (This Role I Gave)
Child: Delete Role (This Role Not Given)

This Thing is Fine. Insert and Every Thing.

My Problem is

1) When I am login the admin screen.
2)Right Side Shows Roles
3)When i am click the particular role it shows what i am assigned that treeview checkboxes only shows.

Here Root Nodes is Checked Correctly but all child nodes are checked. how can i search with the Child nodes also.

Help Me....