Ok, I've tried everything and still cant figure this out. I have the IO firewire plugged into the back of my mac pro. No other firewire devices are plugged in on the back, just the IO. However, I do have a firewire drive plugged in the front of the computer. I don't think this would effect the IO since they are different ports...correct?
I still get the error message:
"Unable to open the specified Video Output device.
It may be in use by another application, incorrectly connected or may be conflicting with a sound input device"