How can I switch between 2 installed video cards?

I have an HP Pavilion dv7-6135dx Entertainment Notebook PC, Windows 7 64-bit. It has two video cards, one is a Mobile Intel(R) HD Graphics card attached to the motherboard, the other is an AMD Radeon HD 6490M video card meant for gaming. The problem is that the computer and all the games and software I install on it only pickup on the Intel HD card, not the Radeon. I have the Catalyst Control Center for the Radeon card and it shows up in the device manager meaning the computer recognizes the card, but I can't download any drivers for the Radeon card from the Internet and nothing else seems to recognize it. This Radeon card series, 6400M, has OpenGL 4.1 and 3D graphics, the amd.com site specifically states this, but games with 3D or which require OpenGL, such as Bethesda's Brink, won't play. The errors say my graphics card does not support 3D or, in Brink's case, it doesn't have OpenGL 3.1 or higher. I'm assuming something is blocking the Radeon Card from working or I need to set the computer to use the Radeon card 24/7. Any help what so ever would be very much appreciated.

Yes I just used HP to install the drivers. It worked unlike the AMD website, but it still doesn't seem to be working. It has all the updates now, but games stil don't seem to recognize the Radeon card, just the Intel HD video card.

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