Strange stacking result

[Bojan Stajcar]

I am very new to this application (so far I was using DSS), and interested in ASTAP because of possibility to stack on very faint objects based on ephemerides.
However, my first attempt in stacking producesd strange result, see attached image.
While DSS stack is OK, it seems ASTAP didn't register frames properly.. there is a shift and stars are not round.
Also, I tried to solve one of the CR2 frames and the stacked image below, but solution was not found (I have D50 installed).
What am I doing wrong?
Thank you in advance and clear skies,
Bojan

EDIT: solution works now, as per Han's reply to other post: https://sourceforge.net/p/astap-program/discussion/general/thread/4b88c7bafd/