OG menu

Hello everybody,
I am an intermediate user drupal. Currently I am working on a project with open 7.x-2.69 atrium. And I would like the groups of menus are displayed on oa_toolbar. My problem is that only the root menus are displayed but not his son. Basically it is not as if the dropdown menu was placed in the bar of the main menus.
How can I make my og_menu are displayed in drop-down menu Mode?
All replies are welcome.
Thank you in advance to all of you.