关于法铁订票不成功的问题

按照之前youxiru 的一个帖子的方法在法铁官网上订票，每次输入完信用卡信息，点了确认之后都提示the service is temporarily unavailable, and your request could not be processed.Please wait a few moments and try again. Thank you for your understanding.用工行或建行的卡都不行啊~有达人能帮帮我么？急啊~~