Error 404 Page - How To Override?

    I've got an event site and I want to redirect error 404's back to the home page. So I've got this in my HTaccess file:

    Code
    1. ErrorDocument 400 /
    2. ErrorDocument 401 /
    3. ErrorDocument 403 /
    4. ErrorDocument 404 /
    5. ErrorDocument 500 /

    That pushes them back to the root of the site.


    But oddly, I'm seeing an OLD error page. Inside the CMS control panel I'm seeing the Error page region, but even when a new master page, it's still finding the old page.


    Is there some kind of process I'm missing for error pages? I thought the HTaccess would override that.