Fullscreen Help

Описание: this is a Test Video,

i want To branch out into Fullscreen games, such as Dawn of war 2 and Myst and Diablo 2/ Fallout 1 + 2 possibly Tactics..

and i Come to this Point Where i can't get It to record Fullscreen or a Get warped or Flickering Video.
if you guys wanna see that I'll record some Left4dead 2 so i can Show you

Any Help would be Appreciated

also and Wouldnt Mind posting My spec's of my computer that may be a Factor Too