Maintenance mode plugin

First of all what ever happened to the wordpress maintenance mode? I couldn’t find it so I downloaded Lauchpad by Obox. It doesn’t seem to work. When I view the page at the top of page is sentence on top of sentences and for some reason it is also clickable which brings me back to the websites homepage. Also even though I have the plugin in turned on the site still shows normally and the maintenance page does not show at all. What’s up with this?