请问LSAT网上报名信用卡的问题

我用的是交通银行的VISA,双币卡,每次都显示:
Your credit card was declined. (Some debit/check cards will decline because they require a billing address which LSAC does not collect.) Enter a different Visa, MasterCard, Discover, or American Express credit card or cancel the request below.
请教这是因为什么原因？怎么解决？谢谢！