Here is a way to check if the right driver was installed.
You can right click and select "View Image" or something similar to see these screen shots in full size.
Click on the windows button in the bottom left corner of the screen.
Right click on "Computer" and select "Properties"
Select Device Manager.
In Device Manager, click on the arrow under "Display adapters".
Right click on your video card series and select "Properties"
Select the tab "Driver" and look at the driver date and driver version.
The driver date should correspond to the driver that you installed, in this case, yours should say "5/9/2011".