richFaces Newbie:
Have a simpleTree based on http://livedemo.exadel.com/richfaces-demo/richfaces/tree.jsf?tab=model

Problem:
I want to remove couple of Nodes from my Tree; Unfortunately these nodes still show up on the Tree:
tree.xhtml

<rich:tree style="width:300px" nodeSelectListener="#{mainTreeBean.processSelection}"
 reRender="selectedNode" ajaxSubmitSelection="true" switchType="ajax" value="#{mainTreeBean.treeNode}"
 var="item" nodeFace="#{item.type}">

backing bean: MainTreeBean.java

public void getMainTree() throws Throwable
 {
 initializeNodes();

 AuxillaryThread auxillaryUserThread = new AuxillaryThread(this,srbWebClient,SrbCommonUtility.User);
 auxillaryUserThread.start();
 auxillaryUserThread.join();

processSelection:

public void processSelection(NodeSelectedEvent event)
 {
 //HtmlTree tree = (HtmlTree) event.getComponent();
 UITree tree = (UITree)event.getComponent();
 nodeTitle = SrbWebCommonUtility.getSrbTreeNodeName(tree.getRowData());
 log.debug("nodeTitle: "+nodeTitle);
 selectedNodeChildren.clear();

removeTreeNode code:

TreeNode locations_At_LocationsNode = SrbWebCommonUtility.srbGetTreeNodeFromUserTree(locationNode, SrbCommonUtility.locations, SrbCommonUtility.locations);
 if(locations_At_LocationsNode != null)
 {
 TreeNode treeNode = locations_At_LocationsNode.getParent();
 if(treeNode != null)
 {
 System.out.println("removing locations@locations "+locations_At_LocationsNode.hashCode()+" from locationNode : "+treeNode.hashCode());
 treeNode.removeChild(locations_At_LocationsNode);
 }
 }

Any idea?Please let me know what I might be doing wrong?