Service Module Help

Hi all, i'm trying to add a service module to one of my apps, this app is for people who take the bus, it makes it easy for them to know when the next bus will arrive, i'am now trying to add some code where the user will be able to select a time to be notified before the bus arrives at a certain busstop, i'm calling the service module from one of the other activities and everything works fine while the app is running and showing on the screen, i get the notification, but press home and leave the application i never get any notifications anymore, can someone help me figure this out?

attached is the code in my service module

View attachment Notification.bas

thanks everyone,
Cheers,
Walter