Hi all!
I have problem with rerendering tree component after child delete. Im trying to do a lazy loading tree with add, move, rename...functionality. It partikulary works, but removing doesnt.

A part of view:

<a4j:outputPanel id="treeOutput">
 <rich:tree value="#{SessionBean.fileTree}" var="item" nodeFace="directory" id="fileTree">
 <rich:treeNode type="directory">
 <a4j:commandLink value="#{item.dirName}"
 action="#{SessionBean.treeNodeClicked}"
 actionListener="#{item.nodeClicked}"
 reRender="listPanel,treeOutput,infoPanel" />
 </rich:treeNode>
 </rich:tree>
 </a4j:outputPanel>


<a4j:commandButton alt="Delete" action="#{SessionBean.directoryDeleteClicked}"
 reRender="treeOutput" />

File tree getter returns only model built in Session Constructor:

private DirectoryNode rootNode;

public TreeNode getFileTree(){
 return (TreeNode)this.rootNode;
 }

Adding or removing changes database and this model; delete func:

public String directoryDeleteClicked(){
 Directory directory = this.selectedDirectoryNode.getDirectoryObject();

 this.rootNode.removeChild(directory.getId().toString());
 directory.getParent().getChildren().remove(directory);
 this.applicationBean.directoryLocal.delete(directory);

 return null;
 }

Model is changed, but tree component doesnt take any change (in delete case). Where I'm wrong, please?