Voucher Style Workflow

We are loading Procurement card transactions into PeopleSoft so it creates one prepaid voucher per statement and individual transactions as regular vouchers. Business requirement is to route "Prepaid" vouchers through Approval and "Regular" vouchers should be auto approved. I have created a new origin called "PCR" and set the approval as Approval Framework and configured custom workflow with Origin as "PCR" and voucher style equals "PPAY" but does not seem to achieve expected result.

Does anyone has done something similar? Looking for any inputs.

Thanks,

Isha