Doctrine Migrations Namespace Error

I am trying to setup doctrine migrations on top of silex framework. I installed it through composer.

"doctrine/dbal": "2.3.*",
"doctrine/migrations": "dev-master",

My console file:

...
$app['composer_loader']->add('Doctrine\DBAL\Migrations', __DIR__.'/../vendor/doctrine/migrations/lib/');

$helperSet = new \Symfony\Component\Console\Helper\HelperSet(array(
    "db" => new \Doctrine\DBAL\Tools\Console\Helper\ConnectionHelper($app['db']),
    "dialog" => new \Symfony\Component\Console\Helper\DialogHelper(),
));
$console->setHelperSet($helperSet);

$console->addCommands(array(
    // Migrations Commands
    new \Doctrine\DBAL\Migrations\Tools\Console\Command\DiffCommand(),
    new \Doctrine\DBAL\Migrations\Tools\Console\Command\ExecuteCommand(),
    new \Doctrine\DBAL\Migrations\Tools\Console\Command\GenerateCommand(),
    new \Doctrine\DBAL\Migrations\Tools\Console\Command\MigrateCommand(),
    new \Doctrine\DBAL\Migrations\Tools\Console\Command\StatusCommand(),
    new \Doctrine\DBAL\Migrations\Tools\Console\Command\VersionCommand()
));

$console->run();

However when I run migrations:status It outputs:

C:\htdocs\bitvenda\app>php console.php migrations:status

  [Doctrine\DBAL\Migrations\MigrationException]
  Migrations namespace must be configured in order to use Doctrine migrations
  .

What I am doing wrong?