Views not displaying on page, but show up in preview
Few possible things you may try to resolve the above problem are:


Make sure the path you are accessing is same as the path you have assigned to page display.
Not using the same path elsewhere (e.g: either in the hook_menu, panels, etc.)
Try changing the path (adding some random chars) for testing and check if it works.
Perform a search in the menu_router table for the path you are using, and if it already had an entry than you need to change the path.