Scrolling and Tapping stop working on xorg 1.5

I just updated from Xorg 1.3 to 1.5 and some functions on my touch pad are gone.

First of all, Xorg 1.5 depends on HAL to access the input devices but I decided to keep the old-fashion way(input devices sections on xorg.conf). So, first thing to do is disable HAL support on xorg.conf.

Section "ServerFlags"
    option  "AutoAddDevices"        "false"
EndSection

Second of all, here is the configuration that I'm using to work both, scrolling and tapping clicks:

Section "InputDevice"
      Identifier  "Mouse0"
#       Driver      "mouse"
#       Option      "Protocol" "auto"
#       Option      "Device" "/dev/input/mice"
#       Option      "ZAxisMapping" "4 5 6 7"
      Driver         "synaptics"
      Option        "SendCoreEvents" "true"
      Option         "Device" "/dev/psaux"
      Option         "Protocol" "auto-dev"
      Option         "HorizEdgeScroll" "1"
      Option         "SHMConfig" "on"
      Option         "Resolution" "1600"
      Option         "rightedge" "5000"

      #Enable Tapping
      Option          "TapButton1" "1"
      Option          "TapButton2" "2"

      #Enable Scroll
      Option          "VertEdgeScroll"        "1"

EndSection