Payment Program Free selection tab fields

Hi,

We would like to pay the vendors against the open items which are due upto a date in the past. For example when we run the payment proposal today(05-10-2011) we want the system to list and pay the invoices which were due on a date a week ago(05-03-2011).

The due date field is not available in Free Selection tab to exclude. Any idea how to make it working?

Thanks

Ram