Using new graphics card together with integrated card.

I recently purchased a Gateway DX4870-UB17 with an Intel 3rd Gen i3 Core that came with an integrated graphics chipset, allowing both HDMI and VGA outputs. I decided to use a Diamond Radeon HD 6450 PCIe x16 card I had purchased recently to allow for me to hook up a 3rd monitor which I have been using on my old computer.

Once I installed the new Radeon, the integrated graphics are no longer detected, and it seems (from what I have been playing around with) that I am unable to use both the integrated and the new card together, as I had been able to do in the past on other computers.

Does anyone know if this is possible and could possibly point me in the correct direction? Any help would be greatly appreciated!