Jtree expandPath is not working

Hi All,
I am performing following opertion on jtree
First i am taking path of selected jtree node.
i am updating jtree
then i am trying to expand jtree on the basis of selected path.
but it is not getting expanded at all.pls help
code --->
TreePath treePath=tree.getSelectionPath().getParentPath();
// below line refreshing tree with new value
TreeStructure.CreateTreeStructure(connDialog.getConnection(), tree, connDialog.getServerName().getText());
tree.expandPath(treePath);
// tree.setSelectionPath(treePath);
tree.setVisible(true);

do u got the solution for ur problem?
if no
this thread show the error source
http://forum.java.sun.com/thread.jspa?threadID=674858
else
tell me the solution

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