cannot get glxgears working on FC7 with nvidia card

[H.S.]

Hello,

I installed FC7 a few days after it was released. But at that I did not 
really try to get 3D working on my nvidia card. Yesterday I sat down and 
installed nvidia drivers from livna. I have these relevant packages 
installed:
$> yum  list installed | grep nvidia
kmod-nvidia-legacy.i686            1.0.7185-2.2.6.21_1.32 installed
xorg-x11-drv-nvidia-legacy.i386    1.0.7185-4.lvn7        installed
xorg-x11-drv-nvidia-legacy-devel.i386 1.0.7185-4.lvn7     installed
$> yum  list installed | grep mesa
mesa-libGL.i386                    6.5.2-10.fc7           installed
mesa-libGL-devel.i386              6.5.2-10.fc7           installed
mesa-libGLU.i386                   6.5.2-10.fc7           installed
mesa-libGLU-devel.i386             6.5.2-10.fc7           installed
$> yum  list installed | grep glut
freeglut.i386                      2.4.0-11.fc7           installed
freeglut-devel.i386                2.4.0-11.fc7           installed

And some stanzas from my xorg.conf files are:
----------------------------------------------------------------
Section "Device"
         Identifier  "Videocard0"
         Driver      "nvidia"
#       Option      "AddARGBGLXVisuals" "True"
#       Option      "DisableGLXRootClipping" "True"
EndSection

Section "Module"
         Load    "i2c"
         Load    "bitmap"
         Load    "ddc"
         #Load   "dri"
         Load    "extmod"
         Load    "freetype"
         Load    "glx"
         Load    "int10"
         Load    "type1"
         Load    "vbe"
EndSection


Section "Extensions"
         #Option     "Composite" "Enable"
EndSection
Section "Extensions"
         #Option     "Composite" "Enable"
EndSection
----------------------------------------------------------------

When gdm start, nvidia logo is displayed so I know that nvidia driver is 
working. But when I start glxgears, I get:
$> glxgears
Xlib:  extension "GLX" missing on display ":0.0".
Error: couldn't get an RGB, Double-buffered visual

Can someone tell me what am I missing?

My nvidia card is:
01:00.0 VGA compatible controller: nVidia Corporation NV11 [GeForce2 
MX/MX 400] (rev b2)

and the kernel I am using is 2.6.21-1.3228.fc7.

thanks,
->HS