Adjustment brush not working

About a week ago my adjustment brush stopped working. I assumed it was because of needing to update as it was around the time the update was released. I went out of town for a week, came back and it's still not working. Updates are complete. Everything else within developer seems to be working. I can bring the adjustment brush up and manipulate settings and it even leaves the working dots but it does not change the image at all, not the slightest. I'm at a loss and really needing to get some work done. Please help!