You won't be able to add sub-pages of the 'Home' page in that way.

Usually I would suggest the creating of another top level page under Home, and then add those pages under there, adding the 'replace_link_with_first_in_nav' attribute to the parent page you created. That way you can get a sub-menu without needing a new top level page. then remove 'Home' from the autonav using the 'Exclude from nav' attribute.

That, or add a Page List next to your Autonav, and treat it as a separate menu section, but blend it into your design so it looks like one menu (probably the harder way to do it)

Thanks Pixelhero, that was my first try but than i have the problem that registered users click on "home" (on their "my account") they get send to old home page :-(((