Vostro 3400 touchpad multiple gesture and two finger scrolling not working

I recently bought a dell vostro 3400 i3 with 4 gb ram. Everything works smooth as silk and I am using maverick but I can't get two finger scrolling and multiple gestures such as zoom etc which it says it supports. Can anyone help ? I have installed gsynaptics and enabled scrolling yet it doesnot work.

My Toshiba U400 has the same problem. Even install gpointing-device-settings didn't work, although at least the option to enable it wasn't greyed out there.

In the end, I found this forum post, which highlighted this little shell script :

#!/bin/bash
#
# list of synaptics device properties http://www.x.org/archive/X11R7.5/doc/man/man4/synaptics.4.html#sect4
# list  current synaptics device properties: xinput list-props '"AlpsPS/2 ALPS GlidePoint"'
#
sleep 5 #added delay... 
xinput --set-prop --type=int --format=32 "AlpsPS/2 ALPS GlidePoint" "Synaptics Two-Finger Pressure" 125
xinput --set-prop --type=int --format=32 "AlpsPS/2 ALPS GlidePoint" "Synaptics Two-Finger Width" 0         # Below width 1 finger touch, above width simulate 2 finger touch. - value=pad-pixels
xinput --set-prop --type=int --format=8  "AlpsPS/2 ALPS GlidePoint" "Synaptics Two-Finger Scrolling" 1 0   # vertical scrolling, horizontal scrolling - values: 0=disable 1=enable
exit

It works for some models, not for others, however. Good luck.