Generally speaking,
If you set up your true south satellite using USALS in your receiver, then all it takes is turning on USALS on the satellites that you want to use. Go to the antenna setup screen, and start going through the satellites, at least from 72W to 129W, and turn on USALS in all the Ku sats.
Probably , in the USALS menu of every satellite, there is a command like " Go to position" . Watch to see if your dish moves, when it stops, try scanning.