Hey,
when I try to record in "Game Mode" HUD appears, but pressing record button doesn't start capturing, and sometimes leaves empty AVI files in recording directory.
This problem happens on every game, and even when i use Action! Remote Control.
I use Windows 7 x64, nVidia GeForce GTX 460 (with latest drivers) - whole Dxdiag log: http://pastebin.com/MnRvubEH