"Drive two displays simultaneously with independent resolutions, refresh rates, color controls and video overlays for each display " - it says you can do this, you must be missing something simple...
Does the extra monitor says "no signal"? Do you have the monitor set to the right input, i.e. VGa, DVI, ect.
Some laptops require a key combination to enable to second monitor.... like holding the 'Fn' key and hitting #8 or something(it is usually in Blue on the Key)..
Are you at least able to get picture on the second monitor...?