That's a really cool system!!
I did find - and only saying because it might help the next guy.
I usually just create all of the content areas within the online editor and the use the developer notes to paste in the various areas on the page for content (works way faster).
However if you are going to use the SEO system at least once you need to use the WA "Add Content to PowerCMS" within Dreamweaver or else the needed codes will not be present and the page will not load if you only paste the code block Jason so kindly showed above.
Or just add the code: <?php require_once("WA_CMS/WA_CMS.php"); ?> to the head and <?php WA_manageSEO(); ?> to the body....and of coarse the seo block to the head Jason shows above.
Correct me if I am wrong.
These things are not present in the Help documentation that I could find.