diff --git a/addons/point_of_sale/point_of_sale.py b/addons/point_of_sale/point_of_sale.py
index 5ed842b2fec..8873ecf07e4 100644
--- a/addons/point_of_sale/point_of_sale.py
+++ b/addons/point_of_sale/point_of_sale.py
@@ -591,8 +591,6 @@ class pos_order(osv.osv):
             'qty': qty,
             'price_unit': price,
         }, context=context)
-        wf_service = netsvc.LocalService("workflow")
-        wf_service.trg_write(uid, 'pos.order', order_id, cr)
         return order_line_id, price
 
     def refund(self, cr, uid, ids, context=None):
diff --git a/addons/point_of_sale/point_of_sale_view.xml b/addons/point_of_sale/point_of_sale_view.xml
index 3fdd96677dc..5bf85aba602 100644
--- a/addons/point_of_sale/point_of_sale_view.xml
+++ b/addons/point_of_sale/point_of_sale_view.xml
@@ -51,7 +51,7 @@
                             <separator colspan="4"/>
                             <group colspan="4" col="8">
                                 <field name="state" />
-                                <button name="%(action_add_product)d" string="Add product" type="action" icon="gtk-ok" states="draft" groups="base.group_extended"/>
+                                <button name="%(action_add_product)d" string="Add product" type="action" icon="gtk-ok" states="advance" groups="base.group_extended"/>
                                 <button name="%(action_pos_payment)d" string="Make Payment" icon="terp-dolar" type="action" states="draft,advance" />
                                 <button name="%(action_report_pos_receipt)d" string="Reprint" icon="gtk-print" type="action" states="paid,done,invoiced"/>
                                 <button name="set_to_draft" string="Set to draft" states="paid" icon="gtk-execute" type="object" />
diff --git a/addons/point_of_sale/wizard/pos_payment.py b/addons/point_of_sale/wizard/pos_payment.py
index fe3dd14db73..8d8a6f8465a 100644
--- a/addons/point_of_sale/wizard/pos_payment.py
+++ b/addons/point_of_sale/wizard/pos_payment.py
@@ -133,7 +133,7 @@ class pos_make_payment(osv.osv_memory):
         prod_obj = self.pool.get('product.product')
         if product_id:
             product = prod_obj.browse(cr, uid, product_id)
-            amount = amount - product.list_price
+            amount = product.list_price
         return {'value': {'amount': amount}}
 
     def check(self, cr, uid, ids, context=None):
@@ -148,10 +148,8 @@ class pos_make_payment(osv.osv_memory):
         order = order_obj.browse(cr, uid, active_id, context=context)
         amount = order.amount_total - order.amount_paid
         data =  self.read(cr, uid, ids, context=context)[0]
-        # Todo need to check ...
         if data['is_acc']:
-            line_id, price = order_obj.add_product(cr, uid, order.id, data['product_id'], -1.0, context=context)
-            amount = order.amount_total - order.amount_paid - price
+            amount = self.pool.get('product.product').browse(cr, uid, data['product_id'], context=context).list_price
 
         if amount != 0.0:
             order_obj.write(cr, uid, [active_id], {'invoice_wanted': data['invoice_wanted'], 'partner_id': data['partner_id']}, context=context)
@@ -175,13 +173,11 @@ class pos_make_payment(osv.osv_memory):
                     order_obj.write(cr, uid, [active_id], {'state':'paid'}, context=context)
                 return self.print_report(cr, uid, ids, context=context)
 
-        if order.amount_paid > 0.0:
-            context.update({'flag': True})
-            # Todo need to check
-            order_obj.action_paid(cr, uid, [active_id], context=context)
-            order_obj.write(cr, uid, [active_id], {'state': 'advance'}, context=context)
-            return self.print_report(cr, uid, ids, context=context)
-        return {}
+        context.update({'flag': True})
+        # Todo need to check
+        order_obj.action_paid(cr, uid, [active_id], context=context)
+        order_obj.write(cr, uid, [active_id], {'state': 'advance'}, context=context)
+        return self.print_report(cr, uid, ids, context=context)
 
 
     def create_invoice(self, cr, uid, ids, context=None):