I was checking out what you have done on your demo and I'm wondering about the Parallel Process you have in your bank...
If I understand what you are trying to do, this will not work. Parallel Processes only work on the map they are placed on. If you are trying to have it so you earn interest constantly, then you are going to want to make this event a common event.
Make the common event a Parallel Process and (you'll have to devote a switch to this event) choose the switch you made for this as the condition switch. While the switch is on, you'll make interest and while the switch is off, you will not.
I have included a demo on how to do this. If you have any questions about this, feel free to ask!
This post has been edited by Akod: Apr 1 2012, 04:20 PM