NVFBC Capture with Full Screen Exclusive Applications

Full screen desktop capture works fine with NVFBC, but sometimes it fails to capture full screen exclusive applications like games. It basically shows a Desktop that is not interactive. I believe the application is surfaced but not being captured. Is there guidance on how to make this work 100%?

I am using an Amazon EC2 G2 instance with a K520 running on Windows Server 2008 64 bit. I have been able to repro this on all the Grid drivers to date.

Thanks,
Quais

Can you provide more details about which specific driver, and what specific game or application are you using?