Please provide more information regarding what is attached to what and what settings are selected.
– Michael CAug 27 '15 at 07:11
See http://photo.stackexchange.com/questions/56682/why-does-the-yn-565ex-need-a-radio-trigger-with-the-yn-560-tx/56776#56776
– Michael CAug 27 '15 at 07:13
And http://photo.stackexchange.com/questions/56123/rf-flash-triggers-and-transmitters/56125#56125
– Michael CAug 27 '15 at 07:23