setParent with child of a 3dMax model

[Andy]

I have a 3dmax model with some subnodes and I want to set another node as a child of one of this subnodes.

I have a simple example file, why is the ball place in the center of the model and not in the center of the subnode? In Vizard 3 it works correctly. Any idea?

import viz
viz.go()

viz.clearcolor(viz.SKYBLUE)
viz.addChild('tut_ground.wrl')
viz.MainView.setPosition([0,1.8,-14])

ball = viz.add('ball.wrl')
ball.setScale(3,3,3)
node = viz.add('testChilddNode_4.IVE')

subNode1 = node.getChild('Quader02-GEODE')
subNode2 = node.getChild('Quader03-GEODE')

ball.parent(subNode2)

node.setPosition([0,3,0])