CCNA, CCNP, MCSA, CCNA Final Exam, All Answer Test Module With 100/100

I'm trying to create my own library in a Symfony2 project but I'm having a hard time doing so... Basically I want to reuse an FTP browser class I made for another project. I copied the class into /vendor/mylib and tried to autoload it like that $loader->registerPrefixes(array( 'Twig_Extensions_' => __DIR__.'/../vendor/twig-extensions/lib', 'Twig_' => __DIR__.'/../vendor/twig/lib', 'Mylib_' => __DIR__.'/../vendor/mylib' )); I then tried to instantiate a Mylib_Test object inside my bundle's controller and I got this error : Fatal error: Class 'Test\FrontBundle\Controller\Mylib_Test' not found in /Applications/MAMP/htdocs/sf2_project/src/Test/FrontBundle/Controller/WelcomeController.php on line 26 Anyone has an idea on how to do this ?