Double check in the Admin zone and see if the Expense application is already in the system (Daptiv includes 3 generic DA's (Dynamic Applications) with our product: Expenses, Change, Risk. If it's already in the system, then you don't want it in there twice just to prevent confusion.
DAs can exist as Enterprise wide (in the Admin zone, check Applications) or at the project level as single instances. It is better to have them Enterprise wide for reporting needs. Take a look at it, if you need some direction or assistance post up and I'll walk you through it.