conn.php 
<?
/*数据库连接*/
$conn=new COM("ADODB.Connection"); 
$dsn="DRIVER={Microsoft Access Driver (*.mdb)};DBQ=".realpath("../../database/syzs.mdb").";";
$conn->open($dsn);
?>news_manager.php
<?
    include_once("../../conn/conn.php");
?>
syzs 根目录    database vipadmin 一级目录   news_manager.php 的路径是 syzs/vipadmin/cn/news/news_manager.php      
错误是 
Fatal error: Uncaught exception 'com_exception' with message '<b>Source:</b> Microsoft OLE DB Provider for ODBC Drivers<br/><b>Description:</b> 操作已被取消。' in E:\Apache2.2\htdocs\syzs\vipadmin\conn\conn.php:5 Stack trace: #0 E:\Apache2.2\htdocs\syzs\vipadmin\conn\conn.php(5): com->open('DRIVER={Microso...') #1 E:\Apache2.2\htdocs\syzs\vipadmin\cn\news\news_manager.php(10): include_once('E:\Apache2.2\ht...') #2 {main} thrown in E:\Apache2.2\htdocs\syzs\vipadmin\conn\conn.php on line 5