To add to Rachael's post, to get a drum fill the bar following the bar you want the drum fill in will usually need to have a part marker added (red, green, blue, whatever color depending on the style and your song setup). Part markers cause drum fills to start in the preceding bar. It might also help to change the second bar after the first held chord into two, two beat bars and have the drums start on beat one of the second 2 beat (actually now third) bar in the sequence. There are usually multiple ways to accomplish the same thing and sometimes one solution works better than another due to style, instruments, tempo, etc.
Good luck.