do u have a reg editor?
its reg a edit that will make it ULTRA sensitive!
also dont forget this is a resistive screen...it needs pressure.
not just a light tap.
i find that my finger nail works best!
since i cut my finger nails i use the back of my finger...if you know what i mean.
if you want to do the edit it is..
43. How to improve screen calibration
HKLM/Hardware/Devicemap/Touch/CalibrationData
Value Data change to > 519,503 177,881 182,129 847,127 849,872
Try & see if the above improves the screen calibration