父母移民广州面谈预约问题 cgi stanley

美国签证中心已经寄来了面谈预约信，时间也定了。可是，比较费解的是，信上要求我们去uscis网站上下载各领事馆的面谈instructions，而广州总领馆要求我们使用什么Cgi Stanley的服务去预约。首先要在这里create new user: 

https://cgifederal.secure.force.com/SiteRegister?refURL=https%3A%2F%2Fcgifederal.secure.force.com%2F%3Flanguage%3DEnglish%26country%3DChina%2522%2520%255Ct%2520%2522_blank

我在不同电脑不同时间用不同的电子邮件做用户名，试了几次，无法成功create user. 提示比较奇怪：

 

• Your request cannot be processed at this time. The site administrator has been alerted.
• The account associated with this portal has no owner
• User could not be created. Please ensure First Name and Last Name are entered as they are in your passport.

请教过来人或知情人，create user有什么特别要求吗？我犯了什么比较低级的错误？这里先谢谢了！