Drivers not working..please help

I own a hp pavilion g6. It has amd raedon hd 7400 series and intel hd 4000 graphics. I recently upraded my os from windows 7 32 bit to windows 7 64 bit. I tried downloading drivers and installing,but nothing seems to work.

The software is asking me to update even after i updated the drivers.

in device manager an yellow trianle is displayed on amd graphic card

no graphic chip is detected in dislay.(I disabled the intel graphic card)