installing Radeon X800 on Vist 64bit

I have brought a ASUS Radeon X800 256mb PCI-E graphics card (EAX800/2DTV/256M) I'm runnig An Athlon 5000+ X2, on a ECS GeForce6100PM-M2, 2Gig Ram(soon to be 4GB) on Windows Vista 64 Bit SP1.
I've the newest drivers not just the one's microsoft site downloads, drivers say they've installed but the a message comes from the task bar saying incompatable display adapters.
Device manager sees the card correctly and when i've cilck update driver tab it says best drivers installed. divice properties say device was stopped because device reported problem (code 43). I can disable the X800 but i cant enable it because windows stops it.
I'm currently using the on board graphics and i dare not try to disable that in case i end up with no display.
Can Someeone Please Help Me?

Thanks James:confused

 

Code 43 in Device Manager
http://technet2.microsoft.com/windo...00d0-4956-a827-bd6bd5eb27761033.mspx?mfr=true

Are you certain you have the correct driver?
Have you tried reinstalling the driver?
Check to make sure the card is seated properly.