Making a custom 404 Error page.

You should customise your 404 page, so it has the website menu on it, wordpress does this automatically, but you need to make your own one with your xsitepro site or self coded site.

This is an example of a good 404 page http://www.pattaya-news.com/take%20me%20away  you can still see the menu and some adverts.  This may keep the user or they can exit through the ads.

As your website gets traffic, Google Webmaster Tools will tell you about all of your 404 errors, which enables you to correct them.