hello,you must adjust the slider TRACKING ADJ, in the RA/DEC part of the stargo interface. dont use the auto adj . if you keep 0 by defaut the sideral rate is not good. -100 works pretty good for me. try to take a 1 second exposure, zoom on the image, take another picture 10 seconds later, and your star moved, wich is not normal. Use the slider, until il doesnt move anymore. then do the calibration of autoguiding if you autoguide.