Done 25 point calibration?
Try to move out a little bit from the crosses on all the sides and see if that will trick it.
i have just got my epia m based system up and running for testing with a lilliput screen.
i have been runnning it for a few weeks, and now some of the edge of the tochscreen dosent work. i.e. when i press the edge it moves the cursor a few cm out from the edge of the screen.
i have tried calibration with no joy.
has this happend to anyone else, and does anyone know if/how i can fix it?