treeview's check box

I have a question for treeview. I set the treeview's checkbox to true. Then, I have the check box with the treeview. I want to set the check box of some nodes to be checked by default. I set it when I loading the form by set the following:

mNode.checked=true.

However, it did not appear in the form when I run the program. Could you tell me why?

It sounds basic but do you have your code between a:

Private Sub form_Load()

'put code here

End Sub


If you can't get it, mail me. I've done this before and I'll send you the code.