FSX / EAH4850 refuses to run

I just installed a new Radeon EAH4850. I was thoroughly fed up with nVidia and after an evening cleaning out the older drivers I set to work installing my new card.
Problem is although I've downloaded the very latest XP drivers for this card, every time I run FSX Acceleration I get the message
"The drivers currently installed for your video card may cause your computer to stop responding when Flight Simulator is running"
It's got me scratching my head - anyone have any ideas?
AMD AM2 X2 dual core 4200+
Asrock SATA2-Glan mobo
4gb DDR2 memory
Radeon EAH4850 512mb card
Realtek mobo sound
Creative Labs sound
Windows XP latest SPs
FSX Acceleration
Cheers for any pointers,
Ian
Problem is although I've downloaded the very latest XP drivers for this card, every time I run FSX Acceleration I get the message
"The drivers currently installed for your video card may cause your computer to stop responding when Flight Simulator is running"
It's got me scratching my head - anyone have any ideas?
AMD AM2 X2 dual core 4200+
Asrock SATA2-Glan mobo
4gb DDR2 memory
Radeon EAH4850 512mb card
Realtek mobo sound
Creative Labs sound
Windows XP latest SPs
FSX Acceleration
Cheers for any pointers,
Ian