报个小ad ut-dallas, 外加求助

终于以一个小ad结束三无了。。
是貌似申了就有的ut-dallas。。。
但邮件里说，之前还得上门课
The Department of Computer Science has admitted you with condition you complete the following prerequisite courses:
CS 5349 Automata Theory
可这会儿上哪儿去这课啊，版上收到ad的有这种情况的吗？该怎么解决呢？