diff --git a/server/AyaNova/biz/WorkOrderBiz.cs b/server/AyaNova/biz/WorkOrderBiz.cs
index dc8708bb..d2821c8a 100644
--- a/server/AyaNova/biz/WorkOrderBiz.cs
+++ b/server/AyaNova/biz/WorkOrderBiz.cs
@@ -2384,7 +2384,7 @@ namespace AyaNova.Biz
                     {
                         dtWorkOrder dto = new dtWorkOrder();
                         CopyObject.Copy(o, dto);
-                        return await WorkOrderPutAsync((dtWorkOrder)o);
+                        return await WorkOrderPutAsync((dtWorkOrder)dto);
                     }
                     return await WorkOrderPutAsync((dtWorkOrder)o) as ICoreBizObjectModel;
                 case AyaType.WorkOrderItem:
@@ -2392,7 +2392,7 @@ namespace AyaNova.Biz
                     {
                         dtWorkOrderItem dto = new dtWorkOrderItem();
                         CopyObject.Copy(o, dto);
-                        return await ItemPutAsync((dtWorkOrderItem)o);
+                        return await ItemPutAsync((dtWorkOrderItem)dto);
                     }
                     return await ItemPutAsync((dtWorkOrderItem)o);
                 case AyaType.WorkOrderItemExpense: