Play Stack with Rapid Weaver

Tried my best have a real problem with the Play Stack
I Open a new project in Rapid Weaver
Click the add button / add stacks
Drag my files into resources / open library / open Hero settings in play /
Drag Play into Drop stacks here.
Open Page inspector / Add poster image / Add Links to self hosted files
Look at front page and the image is in a box? Not in the background of the page any ideas?