problem with Hyundai 17" DELUXSCAN 7770 MONITOR

the problem with my monitor in the linux i don't have 100 hertz max to choose,but in the windows xp and 2000 and 98 i can choose 100 hertz max.
i asked in other forum about this and they told me that i most choose my monitor from the list and if the monitor isn't show in the list i must write a code to the linux if i want the linux will work with my monitor.
so i search my monitor in the list of the fc3 and i found my monitor,but still it's wont give me 100 hertz to choose,only 60 hertz max.

short name: (monitor) Hyundai 17 7770
full namemonitor) 17" DELUXSCAN 7770
my screen card is: radeon 7000/radeon ve but isn't instelled in full mode only base options,because i din't found driver to the ati card for linux.
the linux has instelled the radeon 7000/radeon ve with base options.
so what can i do,can some one help me?

what does your /etc/X11/XF86Config-4 file say about your monitor ( Section "Monitor" )? and what resolutions are listed in your section "Screen" ?

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