can not make it work with the basic configuration show in the documentation

[Saint-Cyr]

Hello !
First of all thank you for this bundle. But note that I've installed and configured it more than 3 times but still not be able to make it work I still get this same error message: Variable "id" does not exist in "MpkCmsBundle:Form:company_registration.html.twig"
When from company_registration.html.twig, I extend 'OhGoogleMapFormTypeBundle:Form:google_maps.html.twig
In the begining I though that it's because I'm using symfony 2.7 but after come back to symfony 2.1, I still get the same error