Unfortunately your video card is now considered legacy hardware (its over 6 years old) and is no longer support by ATI. If you want to use Vista x64 you will need to upgrade your card.
Just out of curiousity though, that is an AGP card, so you must be using an older motherboard as well, have you had any issues with other drivers too?
thanx my friend Shao128
this is my main problem cause I'm using 2 monitors
I also have a twinhan DVB card searching now for it's driver
and Appache fax modem