The last known Linux driver to support this board was 7.6, published on April 2010. All drivers after that only support PCIExpress cards.
Supporting multiple cards will be dependent on the application and the system resources. If 7.6 does not work, then I'd recommend contacting Support. Since it is out of the 3 year warranty and the card has not been sold in 4 or 5 years, there is chance of limited support...
The phone number for your local support office can be found here:
http://www.blackmagicdesign.com/company/