CodeIgniter加载session类 提示异常 如何解决

CodeIgniter加载session类 提示错误 怎么解决
A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at F:\APMServ5.2.6\www\htdocs\application\config\config.php:1)

Filename: libraries/Session.php

Line Number: 672



我的config.php的一部分代码：

PHP code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?php if( !defined('BASEPATH') ) exit('No direct script access allowed');/*|--------------------------------------| Base Site URL|--------------------------------------|| URL to your CodeIgniter root. Typically this will be your base URL,| WITH a trailing slash:||    http://example.com/|| If this is not set then CodeIgniter will guess the protocol, domain and| path to your installation.|*/$config['base_url']    = '';/*|--------------------------------------| Index File|--------------------------------------|| Typically this will be your index.php file, unless you've renamed it to| something else. If you are using mod_rewrite to remove the page set this| variable so that it is blank.|*/$config['index_page'] = 'index.php';/*|--------------------------------------| URI PROTOCOL|--------------------------------------

求高手解答

------解决方案--------------------
config.php 首行是空行？