Setting "frequency" for display monitor

[Jerry]

Xfce 4 Desktop Environment
version 4.6.1 (Xfce 4.6)

FreeBSD 7.3-PRERELEASE

I recently install a Dell SE 198 WFP monitor. Using the "nVidia"
configuration utility, the card was set up and the following was
entered into the "xorg.conf" file:

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GT 220"
EndSection

Section "Screen"

# Removed Option "metamodes" "nvidia-auto-select +0+0"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinViewXineramaInfoOrder" "CRT-0"
    Option         "TwinView" "0"
    Option         "metamodes" "1440x900_75 +0+0; nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

When I enter the XFCE display settings menu, the resolution is
correctly displayed; however, the frequency is listed as "50" with "51"
as an option. When I press the monitor's button to check its settings,
it list the resolution as 1440x900, but a 60Hz rather then a 50 as
listed in the 'display' box menu.. The manufacturer states the monitor
works best at 75Hz, which is what the nVidia configuration utility
placed in the xorg.conf file.

Why am I unable to modify the settings listed by XFCE? Is there
something else I should be doing? The display does appear to be
adequate though.

-- 
Jerry
gesbbb at yahoo.com

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If I have to lay an egg for my country, I'll do it.

	Bob Hope