Before I had an OsCommerce "product not found" page that would show if a SKU was marked out of stock. What should Magic SEO's response be if a URL that doesn't exist executes? If I use a page that never existed as a web address I get the correct 404 response: http://www.make-me-beautiful.c...

I have ErrorDocument 404 http://www.make-me-beautiful.co.uk/error404.php in there but I still see the code ie:
http://www.make-me-beautiful.co.uk/shop ... ducts_id=1

Before I installed Magic SEO if a page wasn't found the user was sent to my custom 404 page. Now if a page is not found they see a page of HTML code. Obviously this is not a good customer experience. It could happen if a customer follows a link to a product that no longer exists. My site has lots of...