I'm running 2 Radeon 7870s. I went to the catalyst controller, chose to enable crossfire and then the two screens that were plugged into my 2nd graphics card went blank. ( I have 3 screens) So I only have on monitor working. When I go to display/screen resolution and hit "detect" it kind of indentifies two other monitors but lists them as "Another Display not Detected" (picture here http://i.imgur.com/j1B8WwV.png). How can I get my cards to detect the other monitors?