I have a 42" akai RPTV which is pretty much the same as a samsung. My screen position is off on this tv. I put in my dvd calibration disc and brought up a crosshatch pattern. I adjusted my vertical and horizontal position and got everything all set. I have read that pressing the add button saves the changes. I press that then turn the tv off, and when I turn it back on nothing was saved. It is back to what it was. Is there something I am doing wrong? Does anyone know how to get these changes to permanantly save?