X200 Tablet touch screen

[adip]

Yesterday i installed debian on my "new" tablet. In input device I have three wacom thinks: stylus, eraser and touch. Stylus is working, eraser is working and i cant use my fingers on screen. I read somwhere that some models doesnt have touchscreen witch can be controlled only by stylus.
This is my model no: 7450-2CU


I found only this http://www.itemtips.com/laptops/lenovo/74502cu/
Input Devices: Stylus
Trackpoint
Touch Screen Yes
How to fix this?