I want to use coolbits to increase fan speed of my Fermi GPU. 280.13 driver installed. Ubuntu 11.10

I edited /etc/X11/xorg.conf as follows, by pressing Alt+F2 and

gksu gedit /etc/X11/xorg.conf

I get

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTX 470"
    Option  "NoLogo"    "True"
    Option "Coolbits" "4"
EndSection

Started getting these messages,
Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap"

So I did this,

sudo aptitude install gtk2-engines-pixbuf

terminal,

a@z:~$ nvidia-settings -a [gpu:0]/GPUFanControlState=1

a@z:~$ nvidia-settings -q fans

1 Fan on z:0

[0] z:0[fan:0] (Fan 0)

a@z:~$ nvidia-settings -a [fan:0]/GPUCurrentFanSpeed=80

ERROR: Error assigning value 80 to attribute 'GPUCurrentFanSpeed' (z:0[fan:0])
       as specified in assignment '[fan:0]/GPUCurrentFanSpeed=80' (Unknown
       Error).

So, it's not working; I can't enter the fan speed percentage. Also from NVidia X Server, there are no fan controls.

http://en.gentoo-wiki.com/wiki/Nvidia#Manual_Fan_Control_for_nVIDIA_Settings