protected void loadChildren() {
    try {
      // connect to the Store if we need to
      if (!store.isConnected()) {
        store.connect();
      }

      // get the default folder, and list the
      // subscribed folders on it
      folder = store.getDefaultFolder();
      // Folder[] sub = folder.listSubscribed();
      Folder[] sub = folder.list();

      // add a FolderTreeNode for each Folder
      int num = sub.length;
      for (int i = 0; i < num; i++) {
        FolderTreeNode node = new FolderTreeNode(sub[i]);
        // we used insert here, since add() would make
        // another recursive call to getChildCount();
        insert(node, i);
      }

    } catch (MessagingException me) {
      me.printStackTrace();
    }
  }