Your Live Gamer HD appears to be configured to output 1280x800 (16:10) and your base resolution is set to 1280x1024 (5:4). Ignoring the fact that you don't actually seem to be using a 4:3 resolution anywhere, does changing the capture card to output 1280x1024 (to match the input, assuming your game is running at 1280x1024) correct the problem? You need to open the source properties window, check the Custom Resolution box and configure the resolution manually.