JFinal事务的问题

ConsultationTicketNode ctn = ConsultationTicketNode.dao;
ctn.set("ID", UUID.randomUUID());
ConsultationTicketNodeContent ctnc = ConsultationTicketNodeContent.dao;
    ctnc.set("ID", UUID.randomUUID());
    ctnc.set("NODE_ID", ctn.get("ID").toString());
boolean succeed = Db.tx(new IAtom(){
    public boolean run() throws SQLException {
        boolean b1 = ctn.save();
        boolean b2 = ctnc.save();
        int count = Db.update("UPDATE CONSULTATION_TICKET SET NOW_STEP=?,CC_STATUS=?,CC_STATUS_LAST_TIME=?", new Integer(step),ConsultationTicket.WAIT_DEAL,currentTime);
    return b1&&b2&&count==1;
}});

//为什么不能这样子呀。。。？