用类似这样试下，这样是治标不治本的：
ACCESS:
Delete From KS_Comment AddDate>=#2014-06-09 00:00:00# and AddDate<=#2014-06-09 23:59:59#

SQL:
Delete From KS_Comment AddDate>='2014-06-09 00:00:00' and AddDate<='2014-06-09 23:59:59'
执行时KS_Comment是现在网站垃圾信息所在实际评论表

执行前记得先备份数据库