CI 2 + DOCTRINE 2 + SQLSERVER 2005 PDO_SQLSRV.DLL

Hi, master...

Please help me,
i was integration : ci2+doctrine2+pdo_mysql status is OK http://103.28.148.89/ci2doctrine2
php.ini http://103.28.148.89 ===> phpinfo()

But ci2+doctrine2+pdo_sqlsrv. Show bugs this :

"Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[IMSSP]: This extension requires either the Microsoft SQL Server 2008 Native Client (SP1 or later) or the Microsoft SQL Server 2008 R2 Native Client ODBC Driver to communicate with SQL Server. Neither of those ODBC Drivers are currently installed. Access the following URL to download the Microsoft SQL Server 2008 R2 Native Client ODBC driver for x86: http://go.microsoft.com/fwlink/?LinkId=163712' in C:\xampp\htdocs\sqlserver\application\third_party\doctrine-orm\Doctrine\DBAL\Driver\PDOConnection.php:36 Stack trace: #0 C:\xampp\htdocs\sqlserver\application\third_party\doctrine-orm\Doctrine\DBAL\Driver\PDOConnection.php(36): PDO->_construct('sqlsrv:server=B...', 'sa', 'password', Array) #1 C:\xampp\htdocs\sqlserver\application\third_party\doctrine-orm\Doctrine\DBAL\Driver\PDOSqlsrv\Driver.php(38): Doctrine\DBAL\Driver\PDOConnection->_construct('sqlsrv:server=B...', 'sa', 'password', Array) #2 C:\xampp\htdocs\sqlserver\application\third_party\doct in C:\xampp\htdocs\sqlserver\application\third_party\doctrine-orm\Doctrine\DBAL\Driver\PDOConnection.php on line 36"

Thanks
GBU