My Drupal secondary menu is not showing up anywhere

I am using the Acquia Slate theme.

http://drupal.org/project/acquia_slate

I've setup my Secondary Menu to show up in "sidebar first" block. What I'm assuming is that when I select something from my Primary Menu (which I renamed) that the secondary menu would show开发者_如何学编程 up. This is not the case. I do have the secondary menu turned on and I'm on the latest Drupal 6 release.

Have a look. http://www.andyczerwonka.com. Under the Software Development menu at the top, I have a secondary menu. When I select that menu, the "sidebar first" block on the left is empty.

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In order to have the secondary menu display nested primary menu items, eg:

primary 1
  - secondary 1
  - secondary 2
primary 2

you need to set the secondary menu source to be the same menu as the primary source. This is done at admin/build/menu/settings

Additionally, you need to make sure that items you want as secondary nav items are properly nested under a primary menu item.

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Yep, this is one of the most confusing things to learn about Drupal. The secondary links block acts much differently form the secondary links element that you have in your theme.

This video really helped me on this issue: http://www.lullabot.com/node/444/play