MaterialState changes in different Nodes

Hi all,

I have a problem with my MaterialStates. I have Spatials in different Nodes and if I change the MaterialState of one Spatial, the Spatial in the other Node is changing in the same color. Can anybody explain why?

I've tried with spatial2.clearRenderState(StateType.Material) after changing the MaterialState of spatial1 but it doesn't work.

I hope anybody can help me,