Boolean Not Rendering

Hi, I have applied a “Boolean” modifier to a mesh then I selected the “Apply” button on the modifier to turn the modifier into geometry. I then rendered out the scene and for some reason the whole top piece is missing. (Note: I used a separate Boolean for all pieces)

I then rotated the model in the viewport and the parts are visible but they are not rendering. I made sure the render icon was selected too.

What a I doing wrong?

http://img213.imageshack.us/img213/5554/boolean.jpg