using a 6950, cant get it to work in catalyst either, it just tells me that the third display is disconnected and i cant see a way to activate it, its 100% plugged in correctly as i can swap between 2 of them, e.g 1-3 1-2 2-3, just cant find a way to have 1-2-3, only thing i can think of is my gpu doesn't support 3, i highly doubt a 6950 cant support 3, even considering it has 3 display connectors.
Thanks for your time btw.