Bueno este es mi problema y discurpen sy es mui tedioso es que ya lo prove todo .Yo ya instale y comfigure los sigientes bundles
     new Sonata\CoreBundle\SonataCoreBundle(),
            new Sonata\BlockBundle\SonataBlockBundle(),
            new Sonata\jQueryBundle\SonatajQueryBundle(),
            new Knp\Bundle\MenuBundle\KnpMenuBundle(),
            new Sonata\DoctrineORMAdminBundle\SonataDoctrineORMAdm  inBundle(),
            new Sonata\AdminBundle\SonataAdminBundle(),
            new FOS\UserBundle\FOSUserBundle(),
            new Sonata\UserBundle\SonataUserBundle('FOSUserBundle'  ),
            new Sonata\EasyExtendsBundle\SonataEasyExtendsBundle()  ,
            new Sonata\CacheBundle\SonataCacheBundle(),
            new Sonata\IntlBundle\SonataIntlBundle(),
            new Sonata\MarkItUpBundle\SonataMarkItUpBundle(),
            new Knp\Bundle\MarkdownBundle\KnpMarkdownBundle(),
            new Ivory\CKEditorBundle\IvoryCKEditorBundle(),
            new Sonata\FormatterBundle\SonataFormatterBundle(),
            new JMS\SerializerBundle\JMSSerializerBundle(),
            new JMS\AopBundle\JMSAopBundle(),
            new JMS\DiExtraBundle\JMSDiExtraBundle($this),
            new JMS\SecurityExtraBundle\JMSSecurityExtraBundle(),
            new FOS\JsRoutingBundle\FOSJsRoutingBundle(),
 
Pero al acceder a la uri / admin me da el sigiente palo
InvalidArgumentException: Doctrine ORM Manager named "" does not exist.
la configuracion que use fue esta 
<code>
fos_user:
    db_driver:      orm # can be orm or odm
    firewall_name:  main
    user_class:     Sonata\UserBundle\Entity\BaseUser
 
    group:
        group_class:   Sonata\UserBundle\Entity\BaseGroup
        group_manager: sonata.user.orm.group_manager
 
    service:
        user_manager: sonata.user.orm.user_manager
 
    profile:
        # Authentication Form
        form:
            type:               fos_user_profile
            handler:            fos_user.profile.form.handler.default
            name:               fos_user_profile_form
            validation_groups:  [Authentication]
sonata_admin:
    security:
        handler: sonata.admin.security.handler.role
    title:       Sistema X
    title_logo:  /bundles/applicationcore/images/escudo.png
    templates:
        # default global templates
        layout:  SonataAdminBundle::standard_layout.html.twig
        ajax:    SonataAdminBundle::ajax_layout.html.twig
 
        # default actions templates, should extend a global templates
        list:    SonataAdminBundle:CRUD:list.html.twig
        show:    SonataAdminBundle:CRUD:show.html.twig
        edit:    SonataAdminBundle:CRUD:edit.html.twig
 
        dashboard: SonataAdminBundle:Core:dashboard.html.twig
 
    dashboard:
        blocks:
            # display a dashboard block
            - { position: left, type: sonata.admin.block.admin_list }
sonata_block:
    default_contexts: [cms]
    blocks:
        # Enable the SonataAdminBundle block
        sonata.admin.block.admin_list:
            contexts:   [admin]
 
        #sonata.admin_doctrine_orm.block.audit:
        #    contexts:   [admin]
        sonata.user.block.menu:    # used to display the menu in profile pages
        sonata.user.block.account: # used to display menu option (login option)
        sonata.block.service.text:
        sonata.block.service.rss:
sonata_cache:
    caches:
        apc:
            token:  s3cur3   # token used to clear the related cache
            prefix: test     # prefix to ensure there is no clash between instances
            servers:
                - { domain: kooqit.local, ip: 127.0.0.1, port: 80 }
sonata_core: ~
sonata_formatter:
    formatters:
        markdown:
            service: sonata.formatter.text.markdown
            extensions:
                - sonata.formatter.twig.control_flow
                - sonata.formatter.twig.gist
                #- sonata.media.formatter.twig
 
        text:
            service: sonata.formatter.text.text
            extensions:
                - sonata.formatter.twig.control_flow
                - sonata.formatter.twig.gist
                #- sonata.media.formatter.twig
 
        rawhtml:
            service: sonata.formatter.text.raw
            extensions:
                - sonata.formatter.twig.control_flow
                - sonata.formatter.twig.gist
                #- sonata.media.formatter.twig
 
        richhtml:
            service: sonata.formatter.text.raw
            extensions:
                - sonata.formatter.twig.control_flow
                - sonata.formatter.twig.gist
                #- sonata.media.formatter.twig
 
        twig:
            service: sonata.formatter.text.twigengine
            extensions: [] # Twig formatter cannot have extensions
 
    sonata_user.yml 
 
sonata_user:
    security_acl:     false
    class:
        user:         Application\Sonata\UserBundle\Entity\User
        group:        Application\Sonata\UserBundle\Entity\Group
 
    profile:  # Profile Form (firstname, lastname, etc ...)
        form:
            type:               sonata_user_profile
            handler:            sonata.user.profile.form.handler.default
            name:               sonata_user_profile_form
            validation_groups:  [Profile]
 
 
 
twig:
    # code...
    form:
        resources:
            - 'SonataFormatterBundle:Form:formatter.html.twig'
 
 
 
# Doctrine Configuration
doctrine:
    dbal:
        # code...
        types:
            json: Sonata\Doctrine\Types\JsonType
# code...
 
# Knp MenuBundle
knp_menu:
    twig:  # use "twig: false" to disable the Twig extension and the TwigRenderer
        template: knp_menu.html.twig
    templating: false # if true, enables the helper for PHP templates
    default_renderer: twig # The renderer to use, list is also available by defaul
</code> 
  
 

