Need to create a third level node in tree view

Hi All,

My requirement is to create a three level value node in tree view. I have create the first level (root node) and second level (first child node). But how to add the third level (child node for first child node).

When i debugged i found that the get_children method of the first child node is not getting called, why is it so since i have not set the value is_leaf in the first child node.

Is there any special place i need to write the coding to append the second child node?

Thanks in advance.

Regards,

Sathiya.