eGalax Touch screen problem

[Sonic]

hello~
I am now trying to port Android-x86 on a IPC(POS system).
My detail spec is as following:
Android version: froyo 2.2
CPU: Intel ATOM N270
CHIPSET: Intel 945GME + ICH7M
TOUCH Screen: (eGalax 10.4" TFT By USB interface )
Hardware tab:
Controller Model : SAT5000UR
Firmware version : 1.08D1
About tab:
Touch Screen Utility
Copyright (C) 2000-2010
eGalax eMPIA Technology Inc.
Version 5.8.0.7716

When I using the "ts_calibrate" function in the terminal.
It comes out the following message:
tslib: selected device is not a touchscreen (must support ABS and
KEY event types)
Couldnt load module input-raw
No raw modules loaded.
tslib: selected device is not a touchscreen (must support ABS_X
and ABS_Y events)
Couldnt load module input-raw
No raw modules loaded.

After these message, I can calibrate the touch screen.
Then I reboot the system.
The touch function not work correct.
It can be touch, but not on the right place where I touched.

BTW~I use the eeepc iso_img to try this.

Does anybady have idea about this issue?
Thanks a lot !!!