I'm not 100% sure but this is what I think...
Here is your monitor page: http://us.aoc.com/monitor_displays/931swl
If you click on "Support" tab you can see your monitor specs in pdf file.
Maximum Resolution - 1366x768x60Hz
Recommended Resolution - 1366x768@60Hz
Supported Resolutions: 640x480@60/67/72/75Hz, 720x400@70Hz, 832x624@75Hz, 800x600@56/60/72/75Hz, 1024x768@60/70//72/75Hz, 1366x768@60Hz
Your adapter supports:
Your monitor native resolution (1366x768) is not listed there.
The only common resolution between two lists is 800x600.
If you can change your monitor native resolution to 800x600 it may work.
Possibly you can do it by connecting the monitor to some other computer and using monitor buttons set the resolution to 800x600.
However your monitor seems to be widescreen while 800x600 is not so the picture will look little bit odd.