Anti-Aliasing Issue

One issue I'm having that hasn't quit been figured out is with my anti-aliasing. No matter how high I increase the camera AA samples, the render looks the same. The only difference is in the render time.

​Samples: 5/5/2/2/2/2
Render Time: 9 seconds

​Samples: 10/5/2/2/2/2
Render Time: 49 seconds

Due to time constraints and seeing no visible change, I opted to keep the samples low.