Hi i have an optus

Question

hi i have an optus telescope when i find a star in my view find or the spacestation orbitating the earth i find it in my view find and when i look through the lens on the scope i see notting and i have start with a 20mm lens i have 9mm and a 12.5mm lens and 2 barlow lens one is x1.5 and the other is x3 please help me get it working if you can