Sony Ericsson :: Elm Accelerometer Is Not Working Properly

On thursday I bought a brand new Elm. Everything seemed to work ok until i have tested the implemented facebook application it automatically checked all the profile in a rush from start to the end (normally it goes profile by profile automatically, but if you tilt the phone left or right it goes one profile left or right). I went to the service menu and i saw the coordinates are not zero when the phone is standing on the edge... i tried to tilt the phone in such way to find the "zero" and I did, but in that case the phone must be tilted a bit backwards and on the diagonal edge of the phone. I also used the SE "Water Level" app and it showed the same result, mine accelerometer is NOT working properly. I searched some pages if there is any way to calibrate it, but found nothing. Does anybody knows if it's possible to calibrate it ? Otherwise I will have to take the phone back to the store.