Why is Pro Tools not communicating with my SSL control surface in Windows 7?
To enable two way HUI communication between Pro Tools and SSL DAW controllers using the IPMIDI driver users must enable Pro Tools to run with administrator level privileges.
Navigate to the “protools.exe” file, by default this is located in C:/Program Files/Digidesign/Pro Tools
Right click on the “protools.exe” file, and select properties. Go to the “compatibility” tab and check the “Run this program as an administrator” box.
This will enable two way communication between SSL and Pro Tools.