Both motor and the receiver are USALS compatible.
YOu should be able to type in the number for you longitude using numbers on the remote and then click once ot the right to change from E to W. Same for latitude. Then you clikc store and it should stay stored for all the satellites (you don't have to re enter it every time you select a new satellite).
If yoiur unit cannot do this either something is wrong with your unit or with your remote maybe!? Do number key work when you try to swith channels? Just wondering.
What version of firmware do you have? Not that there were any problems with this in previous versions, but maybe loading the latest firmware might solve the problem. Keep in mind that if you reload the fimware yourself you void your warranty (although I am not sure if
Sadoun accepts returns if you tried reloading software).
Hope you get it working.