League of Legends Error Play

Please Help , why when i go play League of Legends and start game i got This to wait 5 minute !!
but i was before don't get this 5 minute for waiting .

This Screen : http://www74.zippyshare.com/v/3mNOIwQe/file.html

This happens when you are afk during the game, or leaving the que at the last moment.