Two-Tiered Conditional Navigation

i used the tutorial here (https://www.darrenhoyt.com/2008/02/12/creating-two-tiered-conditional-navigation-in-wordpress/) to install a top nav bar in my page: https://www.diveneycue.com/wordpress/

however I have two pages (https://www.diveneycue.com/wordpress/?page_id=24 and https://www.diveneycue.com/wordpress/?page_id=22 which are child) which are both child pages of the parent https://www.diveneycue.com/wordpress/?page_id=6.

I thought the sub/child pages would show up in the nav bar when i hover over the parent page (Pool Cues). But alas, they do not.

how do i make this happen? please advise. thanks!

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