configuracion xorg

[jabi]

hola listas he actulizado mi ubuntu y me he pasado hoary mi problema ha
sido con  xorg las he configurado y todo bien excepto con el raton que
larueda del raton me funciona como boton no como rueda aqui va mi
configuracion:
 
Section "InputDevice"

# Identifier and driver

    Identifier  "Mouse1"
    Driver      "mouse"
    Option "Protocol"    "IMPS/2"
    Option "Device"      "/dev/input/mice"

# Mouse-speed setting for PS/2 mouse.

#    Option "Resolution"        "256"

  # When using XQUEUE, comment out the above two lines, and uncomment
# the following line.

#    Option "Protocol"  "Xqueue"

# Baudrate and SampleRate are only for some Logitech mice. In
# almost every case these lines should be omitted.

#    Option "BaudRate"  "9600"
#    Option "SampleRate"        "150"

# Emulate3Buttons is an option for 2-button Microsoft mice
# Emulate3Timeout is the timeout in milliseconds (default is 50ms)

    Option "Emulate3Buttons"
#    Option "Emulate3Timeout"    "50"

# ChordMiddle is an option for some 3-button Logitech mice

#    Option "ChordMiddle"

EndSection


agradezco opiniones  saludos jabi