Hold down the right two soft keys under the screen to get into the Boot System and turn on control.
Install the card in slot on the front of the control.
Select SYSTEM DATA LOADING from the main menu.
Select DGSERVO (This will be the only file on the card).
Select YES when prompted. Wait for the screen to say COMPLETE.
Select END to get back to the main menu, and then END again. Finally, select YES.
Power down and power up, control should now boot normally and servo software is updated.