我本来报考的6.8,感觉时间不合适,想改到7.14,经查询有考位,但是选择的时候有这么一段话,“You are attempting to schedule an appointment during a research period and have not agreed to take part in the research. Please schedule a date before 5 July or after 19 Aug 2011.” 难道我不能改到这个时候吗?请问该怎么解决啊?