Dual screen mode in Resolve lite

I just downloaded Davinci resolve and for some reason I can't get it to be on both monitors. The Dual screen option seems to be unactive. Maybe because of the fact, that I have VGA connection to that monitor?

Hello, I have the same issue with a laptop computer connected to a Led TV via HDMI. I can't activate dual screen, the option is grey. Anyone knows why ?

Thanks a lot from France !