Can't update video driver in xp.

I went to the ati website last night and it showed that they had an updated video driver for xp boot camp. So I downloaded it and proceded to install. At the end of the install it asked to restart and when it did I looked at the driver version and it still showed the old version and not the updated jan. 08 version. Has anyone been able to update the driver on there iMac with hd2600pro video card?

Here is the link:
http://ati.amd.com/support/drivers/mac/bootcamp-xp.html