I did a quick search and couldn't find the answer I was looking for.  I am running D7 and in the Page Builder I have clicked "Add Page" after having finished creating it placing in the HTML, I clicked on "View Page"  I get this 404 error:

URL: http://mysite.com/page/newpage1

Not Found

The requested URL /viewPage.php was not found on this server.

How do I fix this problem?

** I took a look on the FTP and the viewPage.php is there on the server