Symfony 2 BlueImp OneupUploaderBundle sql error PostPersistEvent not working

I'm tryimg to build an Eventlistener so that when entity is created path(url) of the images are persisted to Database. I'm using Blueimp (jQuery-File-Uploader). But i'm getting an sql exception. I'm guessing that something isn't linked to my listener.

An exception occurred while executing 'INSERT INTO Image (name, url) VALUES (?, ?)' with params ["dasdasdas", null]

My config.yml

oneup_uploader:
mappings:
    gallery:
        frontend: blueimp

My service.yml

services:
app.bundle.upload_listener:
    class: AppBundle\Eventlistener\ImageuploadListener
    arguments: ["doctrine.orm.entity_manager"]
    tags:
        -  { name: kernel.event_listener,  event: oneup_uploader.post_persist, mehtod: onPostUpload}

My image Entity

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;    
/**
 * Image
 *
 * @ORM\Table()
 * @ORM\Entity
 */
class Image
{
/**
 * @var integer
 *
 * @ORM\Column(name="id", type="integer")
 * @ORM\Id
 * @ORM\GeneratedValue(strategy="AUTO")
 */
private $id;

/**
 * @var string
 *
 * @ORM\Column(name="name", type="string", length=255)
 */
private $name;

/**
 * @var string
 *
 * @ORM\Column(name="url", type="string", length=255)
 */
private $url;


/**
 * Get id
 *
 * @return integer 
 */
public function getId()
{
    return $this->id;
}

/**
 * Set name
 *
 * @param string $name
 * @return Image
 */
public function setName($name)
{
    $this->name = $name;

    return $this;
}

/**
 * Get name
 *
 * @return string 
 */
public function getName()
{
    return $this->name;
}

/**
 * Set url
 *
 * @param string $url
 * @return Image
 */
public function setUrl($url)
{
    $this->url = $url;

    return $this;
}

/**
 * Get url
 *
 * @return string 
 */
public function getUrl()
{
    return $this->url;
}
}

My imageuploadListener

namespace AppBundle\Eventlistener;

use AppBundle\Entity\Image;
use Oneup\UploaderBundle\Event\PostPersistEvent;

class ImageuploadListener
{
protected $manager;

public function __construct(\Doctrine\ORM\EntityManager $manager)
{
 $this->manager = $manager;

}

public function onPostUpload(PostPersistEvent $event)
{   

    $file = $event->getFile();

    $object = new Image();
    $object->setUrl($file->getPathName());

    $this->manager->persist($object);
    $this->manager->flush();
}

}

I'm getting an jquery 500 error, but the images are moved to a folder. The permissions are OK(all access).

POST http://localhost:8000/_uploader/gallery/upload 500 (Internal Server Error)

EDIT: I found this in my error log:

 [2015-04-03 11:23:23] event.INFO: An exception was thrown while getting the uncalled listeners (Catchable Fatal Error: Argument 1 passed to AppBundle\Eventlistener\ImageuploadListener::__construct() must be an instance of AppBundle\Eventlistener\EntityManager, array given, called in D:\x...\app\cache\dev\appDevDebugProjectContainer.php on line 359 and defined) {"exception":"[object] (Symfony\\Component\\Debug\\Exception\\ContextErrorException(code: 0): Catchable Fatal Error: Argument 1 passed to AppBundle\\Eventlistener\\ImageuploadListener::__construct() must be an instance of AppBundle\\Eventlistener\\EntityManager, array given, called in D:\\....\\app\\cache\\dev\\appDevDebugProjectContainer.php on line 359 and defined at D:\\...\\src\\AppBundle\\Eventlistener\\ImageuploadListener.php:12)"} []

EDIT 2: I have changed my EntityManager to \Doctrine\ORM\EntityManager And now i'm getting a different error(dev.log):

 request.CRITICAL: Uncaught PHP Exception Symfony\Component\Debug\Exception\ContextErrorException: "Warning: call_user_func() expects parameter 1 to be a valid callback, class 'AppBundle\Eventlistener\ImageuploadListener' does not have a method 'onOneupuploaderPostpersist'" at D:\...\vendor\symfony\symfony\src\Symfony\Component\EventDispatcher\Debug\WrappedListener.php line 61

Any Idea why? Can please someone explain to me what I'm doing wrong? Which file is calling this method onOneupuploaderPostpersist ?

in your file service.yml

mehtod: onPostUpload

is typo bug, instead of "mehtod" you should have "method"

this method is probably default method that is called on listener by OneupUploaderBundle if not specified otherwise