Graphics card not supported error - will BoinxTV launch on a headless machine?

Hi there, I’m using a Mac Pro with an ATI HD 5770 1GB. Currently can’t launch the app for the first time and I get an error saying that the video card is not supported. I’ve restarted the machine as suggested in a different thread but this didn’t resolve the issue. The machine is currently running headless and the OS is 10.6.8 server (just checking that all latest patches are applied as I type).

My gut tells me (and I hope!) that this is all because there is no monitor attached to the system, can anyone confirm this? (I’m off to find a spare monitor somewhere!)