The FireBox a discontinued device and has limited driver support.
The latest drivers for this interface are listed below:
FireBox 5.13 for PC (Windows XP 32bit only, Windows Vista 32bit / 64bit, Windows 7 32bit / 64bit)
NOTE: The FireBox drivers are not supported on Windows 8 or higher.
FireBox 1.1 for Mac (OS X 10.3.7 Panther - OS X 10.7 Lion)
NOTE: No driver is required for OS X. The software provides a Control Panel and Monitor Mixer only.
The FireBox is not supported on OS X 10.8 Mountain Lion or higher.
NOTE: Firmware updates on the FireBox can only be completed on Windows XP/Vista and Mac 10.3 - 10.5 systems.
Download drivers here: http://www.presonus.com/products/FireBox/downloads
Support for the FireStudio 2626 is provided by e-mail only. To submit a support request, login to your account at http://my.presonus.com and then click Create Ticket.