How to schedule downloads in Advance Download manager?
For you to download on schedule, ADM requires a running service program. Make sure you do not close the service after you have enabled your scheduler
You can do this by:


Giving ADM a higher memory priority (so that it will not be killed when system memory is low)
Whitelisting ADM in phone's power saving features, task killers or hibenation programs
Enabling a persistent notification to keep the program's services running in the background.