Photoshop :: Brush Files Not Displayed When "load...

i am using ps cs3. i have more brushes than i can display so have created a separate brushes folder within the adobe photoshop cs3 folder. it's on the same level as the presets folder. until recently, i've been able to go to that folder from the 'load brushes' option. now, however, when i select 'load brushes' only a few folders are displayed within the adobe ps cs3 folder.

i can no longer see my brushes folder [the one that's on the same level as the presets folder].  on the screencap, you can see the brushes folder and the presets folder. i should be able to navigate to the brushes folder from within photoshop but it doesn't appear.

this is what i see within ps cs at the same level: why isn't the brushes folder showing from within ps? i've been using it for ages and suddenly it doesn't appear.