mouse wheel problem

[Efren Bravo]

Hi,  
  
I've written on /etc/rc.conf :  
  
moused_port="/dev/psm0"  
moused_flags="-r high -z 4"  
moused_type="auto"  
moused_enable="YES"  
  
and on /etc/X11/xorg.conf  
  
Section "InputDevice"  
        Identifier  "Mouse0"  
        Driver      "mouse"  
        Option      "Protocol" "auto"  
        Option      "Device" "/dev/sysmouse"  
        Option      "Buttons" "5"  
        Option      "ZAxisMapping" "4 5"  
EndSection  
  
But the scrollwheel doesn't work. I've tried with Kde's Applications.  
  
Have I a bad configuration?  
  
Thanks...