MDB2 error _doQuery

Hi, I'm still working on the issue with MDB2. i've checked the $mdb2 object and i discover that method doQuery does not exist when i write $mdb2-> So it seems that MDB2.php does not pickup the datasource package pgsql.php. Therefore i would like to know if the following folder struture is correct : - Pear | |-MDB2.php |-.. |-\MDB2\

            |-\Driver
                      |-pgsql.php
                      |-  --> each subfolder has : pgsql.php and

common.phpfiles

            |-...

here is my code in my php file : $dsn = 'pgsql://my_login:my_pwd@my_dbname'; $mdb2 =& MDB2::connect($dsn); if (PEAR::isError($mdb2)) { die($mdb2->getMessage()); } $res =& $mdb2->query('SELECT * FROM articles'); if (PEAR::isError($res)) { die($res->getMessage() . '<br />' . $res->getDebugInfo()); } thanks a lot, Alain