You are using the correct driver for your card click here Download it buy do not install.
Remove the old drivers and uninstall the card from the device manager applet in control panel.
Shut down the PC.
Remove the card from its slot, and reseat it to ensure it has not become loose.
Re-boot, and do not let windows install or look for drivers, use the ones downloaded from the link above.
If that fails, you may have a faulty card.