Need help

More info please  

Are you sure it's a 3850? If it did not came with the install CD maybe your board it's not the one pictured in the box  

Did your XP installed any default drivers? You should try to remove them first and then reinstall the downloaded drivers.

my fella bought a new game and it wouldnt play with the old card so some1 gave us a graphics card which we put in ... i did uninstall the old drivers first which was iti 9550 graphics card i dunno if its not compatible cos i dont know about these things all i know is its a sappire hd 3850 ati radion i went to the site and downloaded the drivers for this card but it isnt recognising the card my computor is old its 4 yrs old u think maybe its not compatible with my board cos its not pci is this card pci

You said "it fitted". How may I ask  

This vga is compatible with PCI-Express and your Motherboard doesn't have a PCI-Express slot? Is this right?  

If so, how "it fitted"?

no my motherboard has vga i think not pci is this card pci or vga it slotted in and is attached by 2 plugs it comes on but wont recognise the card i even downloaded the hotfix i wont work