try adjusting the f number in the camera modifier.... default f8.... try f2.8 or lower for more pronounced DOF... though you might have to increase the shutter speed value to get the exposure back on track.
Adjust the base of the birds scultpure, it's waaaay to black.
Now picture looks weird. Birds, that seemingly is the center of your composition, is out of focus and not interesting part of scene is focused. Not good :]
Still not clear where to look at. DOF isn't strong enough to understand that vase is on focus. And composition, like romullus said..