Extend two monitors not working

extended-desktopmultiple-monitors

Before everything. I had googled a lot and none of the solutions solved my problem.
I had two monitor connected to a graphic card. One of them using VGA cable and another by DVI cable.
My graphic card has only these two outputs.

These are my graphic card and monitors and OS details:

• Monitor One (SumSung SyncMaster P22700 – 1920×1080 – 21.5" ) connected using DVI cable
• Monitor Two (AOC 931Fwa – 1600×900 – 19") connected using VGA cable
• Graphic Card (AMD Radeon™ HD 6570 Graphics)
• OS (Window 8.1 – 64bit – over PC)

Now, when I use Ctrl+P to extend or duplicate my monitors it doesn't work. But I can go to the first and second monitor. The whole thing means that the monitors don't work together. But they work separately.

When I try to extend monitors through the control panel this warning appears:

I have installed the AMD Catalyst Control on the pc and when I choose to extend the monitors through that it gives me this warning:

For additional information on my device manager under the monitors I have two monitors but with the same driver installed I guess. I've tried to uninstall and reinstall the drivers but the second monitor (AOC) uses the first one. By the way it's working with this driver installed.

So, does anyone know what should I do to have extended or duplicated monitors?