MDB2 and PostgreSQL

Hi, I'm still working around my issue with MDB2 and MDB2_Driver_postgres global $dsn;

                       $options = array('debug'       => 2,
                                           'portability' =>

MDB2_PORTABILITY_ALL,

                                       );

                       $query = 'SELECT * from sp_u_001(\'all\')';

                       $db2 = & new MDB2_Driver_pgsql();
                       $db2->connect($dsn);
                       if (PEAR::isError($db2))
                       {
                           die("Error connection :

".$db2->getMessage()."<br><br>".$res->getUserinfo());

                      }

                      //$res =& $db2->query('SELECT * FROM articles');
                       $res = $db2->exec($query);
                       if (PEAR::isError($res))
                       {
                           die("Error connection :

".$res->getMessage()."<br><br>".$res->getUserinfo());

                       }

it does not matter, query or exec functions produce the same error message :

Error connection : MDB2 Error: not found         connect: [Error message:

extension pgsql is not compiled into PHP] where could be the problem ? pgsql is install via PHP.ini and works well if i do not use PEAR packages. thanks a lot for help, -- Alain ------------------------------------ Windows XP SP2 PostgreSQL 8.1.4 Apache 2.0.58 PHP 5