diff --git a/WeighAndGrading/GradeFrom.cs b/WeighAndGrading/GradeFrom.cs
index 1ca74bc..b3fde3f 100644
--- a/WeighAndGrading/GradeFrom.cs
+++ b/WeighAndGrading/GradeFrom.cs
@@ -132,7 +132,17 @@ namespace WeighAndGrading
       catch { throw; }
       finally
       {
-        btn.Enabled = true;
+        var t = new System.Timers.Timer(1000);
+        t.Elapsed += delegate
+        {
+          t.Enabled = false;
+          this.Invoke(new InvokeHandler(delegate
+          {
+            btn.Enabled = true;
+          }));
+          t.Dispose();
+        };
+        t.Enabled = true;
       }
     }
 
@@ -799,11 +809,17 @@ namespace WeighAndGrading
 
     void SetlblSucessVisibleFalse()
     {
-      this.Invoke(new InvokeHandler(delegate
+      System.Timers.Timer tm = new System.Timers.Timer(1000);
+      tm.Elapsed += delegate(object sender, System.Timers.ElapsedEventArgs e)
       {
-        Thread.Sleep(1000);
-        lblSucessed.Visible = false;
-      }));
+        tm.Enabled = false;
+        this.Invoke(new InvokeHandler(delegate
+          {
+            lblSucessed.Visible = false;
+          }));
+        tm.Dispose();
+      };
+      tm.Enabled = true;
     }
 
     void SetlblSucessVisibleTrue()