亚航支付问题

订票到最后一步，submit payment按下以后出现以下错误：

ERROR

[5140: PaymentValidationError] An unknown error has occured with the form of payment you have chosen. You have not been charged, but due to system failure we cannot accept this form of payment at this time. Please try another form of payment or try again at a later time.


An error has occurred. Please try again. If the error persists, please contact the system administrator. WarningExceptionType Description not found: PaymentSystemValidationErrorTypeInvalidAmount : Payment method VI does not allow zero amounts


试过IE8,火狐，谷歌浏览器。

country下拉菜单可以选择。