monitor refresh rate

I have a Dell M770 monitor hooked up to a Raedon 9600 with the latest ATI graphic drivers. Under XP, I can run the monitor at 1152x768 @85Hz. Under Vista (32-bit) I am only able to run the monitor at 60Hz. Also, the 'Hide modes that this montior cannot display checkbox' under the Montior tab is disabled so I can't overide the setting. Any idea how I can get my refresh rate settings back?
Thanks!

I've experienced this as well... try reinstalling the drivers for your graphics card and/or monitor - fixed mine :o)
-- Zack Whittaker » ZackNET Enterprises: www.zacknet.co.uk » MSBlog on ResDev: www.msblog.org » Vista Knowledge Base: www.vistabase.co.uk » This mailing is provided "as is" with no warranties, and confers no rights. All opinions expressed are those of myself unless stated so, and not of my employer, best friend, Ghandi, my mother or my cat. Glad we cleared that up!
--- Original message follows --- "Keith Sheehan" wrote in message

I have a Dell M770 monitor hooked up to a Raedon 9600 with the latest ATI graphic drivers. Under XP, I can run the monitor at 1152x768 @85Hz. Under Vista (32-bit) I am only able to run the monitor at 60Hz. Also, the 'Hide modes that this montior cannot display checkbox' under the Montior tab is disabled so I can't overide the setting. Any idea how I can get my refresh rate settings back?
Thanks!