Yeah, I was trying to setup a card for my mate which had the same problem running cataylist drivers. It is there, but your using default windows drivers which it can't detect.
Go to Start, Contorl Panel.
Go into system, then select the Hardware tab, and go into Device Manager.
Find the Display adapters and double click on what it says it has. Whent he window loads up, go into the driver tab, and select update driver.
Select to install from a specific location and click next
It will now hopefully display a list of drivers that can be used. Select one with your card name and your operating system with the latest driver version if possible.
Now press next and install it. After it has installed restart the pc. After this has happened, you can try and update using the Catlyst Drivers again. At least it will know what the card is this time
Hope this helps