Question : lenovo x201 tablet digitaltizer calbration

new lenovo laptop x201t tablet  windows 7 x64 professional version.
my pen does not seem be accurate on screen, especially it happens close to edges and corners of screen.
i have tried calibration within windows 7, it does not help much.
does anyone have better idea?

thanks

Answer : lenovo x201 tablet digitaltizer calbration

Or do the trick: http://www.xiirus.net/articles/article-vista-calibrate-your-tablettouchscreen-with-more-points-92oq6.aspx