I've got a client who has a graphics card with two DVI outputs. 

He bought two brand new VGA screen yesterday, so I tried fitting them using two DVI to VGA adapters, one for each screen, but it doesn't work.

Someone told me you can't use two DVI to VGA adapters at the same time but Googling doesn't bring up any definitive answers. All the search results I get are about using one DVI screen and one VGA screen.

Is using two DVI to VGA adapters possible? If not, what might be the solution? How about a DVI adapter that splits into two VGAs?