Before you can begin adding your wiki headers to your forums, you need to set up the Header area. Visit VaultWiki > Namespace Manager. For the namespace called "Header", click "[Edit]".
Headers.jpg
For the setting "Top-Level Forum", choose "Create New Forum".
Create new forum.jpg
Click "Save", and the new forum window will appear. Check that the settings are correct, and submit.
Create top level forum.jpg
You can now begin creating forum headers.