Originally Posted by Freebase Dali

When you re-install, make sure to leave the keyboard unplugged from the computer before installing the software and drivers, then plug the keyboard in after the installation is complete.
I'm not sure if that's the issue, but I do notice that it's a step that's pointed out in a lot of manuals for hardware installations that require separate software driver installations.

Also...
I'm not sure about Pro-Tools, but I know that when I make hardware changes with Sonar, I have to re-scan for compatible devices in the music program itself in order for them to register and associate correctly, so after your re-installation of the hardware and drivers, see if there's a way to do that in Pro-Tools.

If that doesn't sort you out, let us know.