Multi-module lack of inheritance

[Rodrigo Madera]

I have a project layout like this:

myapp
        pom.xml (packaging = pom, name = MyApp Parent)

        api
                pom.xml (packaging = jar, name = MyApp API)
        core
                pom.xml (packaging = jar, name = MyApp Core)
        extensions
                pom.xml (packaging = pom, name = MyApp Extensions Parent)

                myextension
                        pom.xml (packaging = jar, name = MyApp MyExtension)

The problem is that extensions/pom.xml is *not* inheriting basic (and
needed) stuff from myapp/pom.xml.

Any clues?

Thank you for your attention,
Rodrigo