Trinidad 2.0.0 ,tr:treeTable expand/collapse commands

[Zibitsker Tamilla]

Hi, I use trinidad 2.0.0 ,my problem is expand/collapse commands of 
tr:treeTable I think they are supposed to automatically expand/collapse tree 
nodes, but by clicking them, nothing happens and I got the exception

SEVERE: Error Rendering View[/MyXhtml.xhtml] 01/05/2012 15:31:08 
org.apache.myfaces.trinidadinternal.renderkit.core.xhtml.PanelPartialRootRenderer
 encodeAll SEVERE: Error displaying partial page java.lang.NullPointerException 
at 
org.apache.myfaces.trinidad.render.CoreRenderer.getFacesBean(CoreRenderer.java:739)

the reason of this that it is happening around line 739 of 
CoreRenderer#getFacesBean():

  736 protected FacesBean getFacesBean(
  737 UIComponent component)
  738 {
  739 return ((UIXComponent) component).getFacesBean();
  740 }

So, component is null.