Hello,
You won't need to use Midi Studio to have your Keyboard work in Pro Tools as a midi controller.
In the top menu of Pro Tools, go to Setup/Midi/Input Devices.
Do you see you keyboard? Is it checked?
If you see it there is will be ready for Pro Tools.
This link will help you get sound out of you midi keyboard in Pro Tools.
http://www.m-audio.com/index.php?do=...20d564b390cb42
Cameron