Touch Screen issue on ARCHOS101 linux

[Sparsh]

Hi All,
I'm trying to port linux-2.6.29-omap1 on ARCHOS101IT. It is working fine but it has some issue with ts_calibrate. calibration of touch screen is not proper-
MY_SETUP:

The module I'm trying-
#vim ts.conf
.............
................
# Uncomment if you're using an IBM Arctic II
module_raw arctic2

module pthres pmin=1
module variance delta=30
module dejitter delta=100
module linear
............
and event I've used:
platform-ohci-omap.0-usb-0:2:1.0-event

when I'm trying:
#cat dev/input/by-path/platform-ohci-omap.0-usb-0\:2\:1.0-event

It's working fine but when I'm trying :
#ts_calibrate
It takes all samples in one touch.

I'm unable to find why it is happening. Please help me to resolve this issue.
Thanks in advance