Status of Paid Expense Reports in iExpenses

When reviewing expense reports in iExpenses, the only expense reports that have the status of PAID, are those that had payment generated in Payables by either wire or manual check. Those expense reports that were paid by check in Payables, still have a status of READY FOR PAYMENT why reviewing the expense reports in iExpenses. Does anyone know why this status is not changing for all those reports paid by check? Is there a setup function missing in Payables, causing this status not to change in iExpenses?