Not able to select my Radeon 9600 for harware acceleration

From: Patrick (Patrick_at_discussions.microsoft.com)
Date: 10/31/04 

Date: Sun, 31 Oct 2004 00:36:01 -0700

If I go in settings, display, hardware, the combobox for harware
acceleration is grayed out and cannot select it. I did verify that all
acceleration option are ON in the DXDIAG application"

Any hint????

Thanks