If dbCircle works, then your directory is fine. dbBox and dbCircle are in the same library. I had a problem with dbCircle, but not dbBox, so I created a function that did the job for me. Making a box is super simple:
create a memblock the size of the box
fill in the memblock with the color
make an image using the memblock
(sprite if you want)
display
I would even go one step further. Make your function take the following parameters:
location (upper left)
size (sx,sy)
color
bool FilledIn;//if false, make an outline leaving the inside open
The fastest code is the code never written.