Update composer.json problem with CMF

Resloving this error
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - doctrine/phpcr-bundle 1.0.0 requires phpcr/phpcr-implementation 2.1.* -> no matching package found.
    - symfony-cmf/menu-bundle 1.0.0 requires doctrine/phpcr-bundle 1.0.* -> satisfiable by doctrine/phpcr-bundle[1.0.0].
    - Installation request for symfony-cmf/menu-bundle 1.0.* -> satisfiable by symfony-cmf/menu-bundle[1.0.0].

Potential causes:
 - A typo in the package name
 - The package is not available in a stable-enough version according to your minimum-stability setting
   see <https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion> for more details.

Read <http://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.
vagrant@precise64:/vagrant$ php composer.phar update