You'll need to add LTFT Low, LTFT Mid, and LTFT High, as well as STFT. The Low will help tune your 50 Hz airflow slider, the Mid for your 150 Hz slider, and the High for your 250-400 Hz sliders.
Then once you've added them to your Captured Values list, make sure to go to Display > Values and add them to the list on the right so that you can view them.
Check out this link for instructions on how to adjust the sliders:
http://www.jeffgst.com/gmafcalibration2.html