Sub Menu TopNav dropdown

Hi there how do i get the topNav sub menu to contain dropdowns? I can only enable it for MainMenu, but not for a sub menu.

Currently only Main Menu has dropdown.

menufix.jpg

I want to enable drop down for Sub Menu located in TopNav:

menufix2.jpg

How can we achieve this? Seems to be no setting?

Bump? anyone? seems like all the templates that are really good only have drop downs for MAIN MENU, can't get a drop down for TOPNAV Module menu?

Had to use rocket theme rokMenu, can Gavick create their own menu extension?