When I downloaded radeon 9550 256 mb I get this message

"ZERO DISPLAY SERVICE ERROR"

How can I fix this?

XP Home
512 memory
80 g hard drive

Is it the drivers that you downloaded? From where?
Which video card do you have installed?

I have a Radeon Sapphire 9550 256 mb video card

I downloaed the drivers from the there website.

I have the net. Framework installed also

Driver version Catalyst 6.8 Windows XP