File name case-sensitive

[eluser]chengfeng[/eluser]
That file is CI file. You see URI.php in require(/var/www/system/libraries/URI.php). In /var/www/system/libraries, the file name is lower-case (uri.php) not upper-case. So, if i rename uri.php to URI.php; it works. And then it will show another the same error "/var/www/system/database/DB.php". Then I rename db.php to DB.php; it works, Then another one.

I think it has something to modify in php.ini to make it case-insensitive.But I don't know what i should change. Hope you understand what i say. Sorry for my bad English.