diff --git a/DOAN.Service/Bydlms/BydWorkorderService.cs b/DOAN.Service/Bydlms/BydWorkorderService.cs
index 8e3b43b..30dae4d 100644
--- a/DOAN.Service/Bydlms/BydWorkorderService.cs
+++ b/DOAN.Service/Bydlms/BydWorkorderService.cs
@@ -162,7 +162,7 @@ namespace DOAN.Service.Bydlms
 
             BydWorkorder downIndex = Context.Queryable<BydWorkorder>()
                 .Where(it=>it.LineCode==fisrt.LineCode).Where(it=>it.OrderStartTime==fisrt.OrderStartTime)
-                .Where(it => it.Sort > fisrt.Sort).OrderByDescending(it => it.Sort).First();
+                .Where(it => it.Sort > fisrt.Sort).OrderBy(it => it.Sort).First();
             if (downIndex == null)
             {
                 return true;