Working exactly as intended. If you run crossfire, with two screens , when you fire up a game in full screen mode. The second screen with either A. Keep the last image on the screen , or B. Go blank.
The reason for that, is in order for crossfire to work, You have to run the game in full screen mode in order to get the benefits of your second card.
If you run it in windowd mode. Then crossfire is not active. Thus you have access to both screens.
I5 3570K@4~5.0ghz: Gigabyte GA-Z77X-UD3H:Corsair Hydro H110 :16GB Corsair Vengeance DDR-3 1600: XFX Radeon 7950 @ 1100/1575 : Corsair AX 860 PSU: x2 WD Black 1TB HDD's: 90GB Agility 3:Creative Labs X-FI:Corsair 500R Arctic White Edition:3 22inch Monitors Eyefinity @ 5294x 1050 : Alienware Tact-X Keyboard: Razer Naga :Corsair Vengence 1500 Headset: Corsair SP2500 Speakers