Hi I'm having some troubles connecting 2 external monitors to my v570 laptop. When I connect the first one through a hdmi to dvi cable it works good to exten the screen between both the laptop screen and the external. When I try to connect the second monitor through vga to vga it automatically disables the first monitor and enables the second monitor. It won't give me an option to enable both monitors plus the laptop screen. Can anyone give me some insight on what might be causing this issue.