You've properly connected both monitors, one via VGA->DVI adapter, and it's not showing the other monitor. Have you enabled the monitor in the Intel® Graphics and Media Control Panel™?
Hit Ctrl + Alt + F12 to open the Intel® GMCP. Go to the 'Display' tab -> 'Multiple Displays'. Change the operating mode to 'Extended', and make sure both your primary and secondary displays are selected as your two monitors. Hit 'Apply' and see if the other monitor decides to come to life.
Let me know if you are still having this issue!
Can you provide for me the following information please;
-What operating system do you have installed?
-Is it 64 or 32 bit?
-What CPU are you using?
-What display adapter driver do you have installed?
Also; if you just have one monitor connected, using the VGA->DVI adapter (the other monitor is not connected), do you get a display?
My PC is running Windows 7 Ultimate 64bits (Service Pack 1) with Intel HD Graphics 2000 (I downloaded all the latest drivers here in the Intel site - 220.127.116.1175 - Intel64 Family 6 Model 42 Stepping 7).
I don't have other video board. It's an Intel Core i3-21210 CPU @3.3GHz
The other monitor display is just black, the power button keeps blinking. It's two Samsung SyncMaster 732N.
That's the adapter I bought (http://www.tech-faq.com/wp-content/uploads/2011/05/dvi-to-vga-adapter.jpg)