Why my touch screen can not work?

[Leo]

I prepare to port Meego(Linux based) to my devkit8000, follow the porting
guide
http://wiki.meego.com/ARM/Meego_on_B...d_from_scratch<http://wiki.meego.com/ARM/Meego_on_Beagleboard_from_scratch>
everything seems ok: show the home screen, launch the application,
But there's problem about touch screen. Meego can not recognize my behavior.
I'm not sure it's related with Xorg or driver. Here is my Xorg log:

59.837] (II) config/udev: Adding input device ADS7846 Touchscreen (/dev/i)
[ 59.837] (**) ADS7846 Touchscreen: Applying InputClass "default"
[ 59.841] (**) ADS7846 Touchscreen: Applying InputClass "evdev touchscreen "
[ 59.842] (**) ADS7846 Touchscreen: always reports core events
[ 59.842] (**) ADS7846 Touchscreen: Device: "/dev/input/event3"
[ 59.842] (--) ADS7846 Touchscreen: Found absolute axes
[ 59.842] (--) ADS7846 Touchscreen: Found x and y absolute axes
[ 59.842] (--) ADS7846 Touchscreen: Found absolute touchscreen
[ 59.843] (II) ADS7846 Touchscreen: Configuring as touchscreen
[ 59.843] (**) ADS7846 Touchscreen: YAxisMapping: buttons 4 and 5
[ 59.843] (**) ADS7846 Touchscreen: EmulateWheelButton: 4, EmulateWheelIner0
[ 59.845] (II) XINPUT: Adding extended input device "ADS7846 Touchscreen" ()
[ 59.851] (II) ADS7846 Touchscreen: initialized for absolute axes.
[ 59.854] (II) config/udev: Adding input device ADS7846 Touchscreen (/dev/i)
[ 59.854] (**) ADS7846 Touchscreen: Applying InputClass "default"
[ 59.855] (**) ADS7846 Touchscreen: always reports core events
[ 59.855] (**) ADS7846 Touchscreen: Device: "/dev/input/mouse0"
[ 59.855] (EE) ioctl EVIOCGNAME failed: Inappropriate ioctl for device
[ 59.856] (II) UnloadModule: "evdev"
[ 59.856] (EE) PreInit returned NULL for "ADS7846 Touchscreen"
[ 60.102] (NI) OMAPFBSaveScreen: Dim backlight?

who has the experience about these kind of problem, pls talk to me!
thanks very much
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