！！！！！！！update语句更新数据库问题？大家看看问题出在那里？
我想要更新USER表里的alogouttime和atotaltime,运行页面时没有提示错，但这两个字段却没有更新，看了半天也不知道是那写错了；大家帮忙看看问题在那？谢谢！
conn.execute( "update   User   set   alogouttime= "&now()& ",atotaltime=atotaltime   +   "&datedIff( "n ",session( "starttimes "),Now())& "   where   username= ' "&session( "username ")& " ' ")

------解决方案--------------------
conn.execute( "update [User] set alogouttime= ' "&now()& " ',atotaltime=atotaltime + "&datedIff( "n ",session( "starttimes "),Now())& " where username= ' "&session( "username ")& " ' ")