Custom Template Not being Applied to Nav on 404 Page

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I created a custom page_not_found page using the site theme and that page works fine (i.e.http://www.desks-incorporated.com/page_not_found).... However if you go tohttp://www.desks-incorporated.com/oldsite.cfm... (the old site we just moved from was a Colf Fusion site) you get the themed page but the Custom Template hasn't been applied to the Autonav. On this version of the page there are no Edit buttons, even when I'm logged in and as a result there doesn't seem to be a way to apply the Custom Template to the nav bar. Any suggestions on how I can fix this?

pixo