[gel]

with my 2 x Barlow/ZWO ASI120MM/MC I can capture and record Jupiter and Mars but for the life of me i cant capture Saturn, i can see it with my 25mm plossel/9mm nagler,but try as i might i cant get it to focus when i insert the Zwo.ive spent 2 hours atleast trying to resolve this ie,with barlow/no barlow. im using sharpcap as a medium as / other planets.what am i doing wrong?thanks