PHP CodeIgniter and Doctrine - codeigniter

Question

I would like to ask if any one of you can help me.
History:
Set-Up CodeIgniter
Copy the Library of Doctrine
Create the Doctrine.php
Test the Controller - hello world - ok
Test the Model by saving data into Database - failed
Error :
A PHP Error was encountered
Severity : Warning
Message :
require(C:/CI/system/application/libraries/Doctrine/Common/ClassLoader.php\Doctrine\ORM\Configuration.php): failed to open stream: No such file or directory
Filename : Common/ClassLoader.php
Line Number : 164
Fatal error : require(): Failed opening required 'C:/CI/system/application/libraries/Doctrine/Common/ClassLoader.php\Doctrine\ORM\Configuration.php' (include_path='.;C:\php\pear') in C:\CI\system\application\libraries\Doctrine\Common\ClassLoader.php on line 164
Copy of Doctrine.Php
<?php
use Doctrine\Common\ClassLoader,
Doctrine\ORM\Configuration,
Doctrine\ORM\EntityManager,
Doctrine\Common\Cache\ArrayCache,
Doctrine\DBAL\Logging\EchoSQLLogger;
class Doctrine {
public $em = null;
public function __construct()
{
// load database configuration from CodeIgniter
require_once APPPATH.'config/database.php';
// Set up class loading. You could use different autoloaders, provided by your favorite framework,
// if you want to.
require_once APPPATH.'libraries/Doctrine/Common/ClassLoader.php';
// require_once APPPATH.'libraries/Doctrine/Common/ClassLoader.php';
$doctrineClassLoader = new ClassLoader('Doctrine', APPPATH.'libraries/Doctrine/Common/ClassLoader.php');
$doctrineClassLoader->register();
$entitiesClassLoader = new ClassLoader('models', rtrim(APPPATH, "/" ));
$entitiesClassLoader->register();
$proxiesClassLoader = new ClassLoader('Proxies', APPPATH.'models/proxies');
$proxiesClassLoader->register();
// Set up caches
$config = new Configuration;
$cache = new ArrayCache;
$config->setMetadataCacheImpl($cache);
$driverImpl = $config->newDefaultAnnotationDriver(array(APPPATH.'models'));
$config->setMetadataDriverImpl($driverImpl);
$config->setQueryCacheImpl($cache);
$config->setQueryCacheImpl($cache);
// Proxy configuration
$config->setProxyDir(APPPATH.'/models/proxies');
$config->setProxyNamespace('Proxies');
// Set up logger
$logger = new EchoSQLLogger;
$config->setSQLLogger($logger);
$config->setAutoGenerateProxyClasses( TRUE );
// Database connection information
$connectionOptions = array(
'driver' => 'pdo_mysql',
'user' => $db['default']['root'],
'password' => $db['default']['root'],
'host' => $db['default']['localhost'],
'dbname' => $db['default']['ci_database']
);
// Create EntityManager
$this->em = EntityManager::create($connectionOptions, $config);
}
}
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Answer 1

May be you miss the load Doctrine files into your system/application/plugin
Refer this

Answer 2

you should copy Doctrine folder containing DBAL, Common and ORM inside application/third-party directory.