[PROBLEM] Touchscreen calibration is wrong and i'm going crazy.

[wash]

Hallo, i have a problem with egalax resistive 7" calibration.
i tried to calibrate with the ts_calib and in the ts_test works good, but in the xbmc doesn't work as expected.
with raspbmc i have the same exact problem but no help from their forum.
with xbian i have 2 problems:
when i touch the screen with the finger, the system became almost unresponsive, i have to kill uimapper from ssh to make it work again.

anyway, the calibration is not correct, if i move the finger up 2 cm, the cursor goes up 4 cm, if i move the finger left 2 cm, the cursor goes right 4cm, if i click the center of the screen, the cursor is...i don,'t know, somewhere out of the screen...

i'm going to put my raspberry into the trash.

please help me