Requiring stuff question

I have the following in a config file: // Define and require the Smarty library define('SMARTY_DIR', 'Smarty/'); require(SMARTY_DIR . 'Smarty.class.php'); // Define the pager stuff define('PAGER_DIR', 'Pager/'); require(PAGER_DIR . 'Pager.php'); require(PAGER_DIR . 'Pager_Wrapper.php'); // Define the DB package define('PEAR_DB', 'DB/'); require(PEAR_DB . 'DB.php'); The Smarty stuff works no problem. The DB and Pager stuff do not. Since I am new to PHP I may be just misunderstanding how to do it. I am using Apache/PHP on Windows. Robert