if(directoryEntry == null) return false;
	public boolean _rename(VFSSession session, String from, String to,		Component comp) throws IOException	{		FtpAddress address = new FtpAddress(from);		FtpClient client = _getFtpClient(session,address,true,comp);		if(client == null)			return false;		VFS.DirectoryEntry directoryEntry = _getDirectoryEntry(			session,from,comp);		client.renameFrom(address.path);		client.renameTo(new FtpAddress(to).path);		VFSManager.sendVFSUpdate(this,from,true);		return client.getResponse().isPositiveCompletion();	}