=== modified file 'account_payment_discount_extension/wizard/wizard_payment_discount_order.py'
--- account_payment_discount_extension/wizard/wizard_payment_discount_order.py	2010-09-13 08:56:04 +0000
+++ account_payment_discount_extension/wizard/wizard_payment_discount_order.py	2010-09-15 15:39:41 +0000
@@ -62,7 +62,7 @@
         ctx = '''context="{'journal_id': %d}"''' % payment.mode.journal.id
 
     # Search for move line to pay:
-    domain = [('reconcile_id', '=', False),('account_id.type', '=', payment.type)]#,('account_id.type', '=', payment.type),('amount_to_pay', '<>', 0)]
+    domain = [('reconcile_id', '=', False),('account_id.type', '=', payment.type),('amount_to_pay', '>', 0)]#,('account_id.type', '=', payment.type),('amount_to_pay', '<>', 0)]
 #    domain = domain + ['|',('date_maturity','<',search_due_date),('date_maturity','=',False)]
     #if payment.mode:
      #   domain = [('payment_type','=',payment.mode.type.id)] + domain
@@ -73,7 +73,7 @@
         if line.invoice.id:
             invoice_data = invoice_obj.browse(cr, uid, line.invoice.id, context=context)
             current_date = datetime.now().strftime('%Y-%m-%d')
-            if invoice_data.date_due >= current_date and invoice_data.date_due <= search_due_date:
+            if invoice_data.date_due <= search_due_date or (invoice_data.next_payment_date >= current_date and invoice_data.next_payment_date < search_due_date):
                 line_ids.append(line.id)
 
     FORM.string = '''<?xml version="1.0" encoding="utf-8"?>