diff --git a/BWP.WinFormControl/WeightControl.cs b/BWP.WinFormControl/WeightControl.cs
index cee7b6d..2d5b8b6 100644
--- a/BWP.WinFormControl/WeightControl.cs
+++ b/BWP.WinFormControl/WeightControl.cs
@@ -102,7 +102,7 @@ namespace BWP.WinFormControl
           weightSerialPort.Open();
           if (mainForm == null)
             mainForm = ComponentUtil.GetParentFormm(this);
-          mainForm.FormClosing += MainFrom_FormClosing;
+          mainForm.FormClosed += MainFrom_FormClosed;
         }
         catch (InvalidOperationException)
         {
@@ -214,7 +214,7 @@ namespace BWP.WinFormControl
 
     void DisableWeight()
     {
-      mainForm.FormClosing -= MainFrom_FormClosing;
+      mainForm.FormClosed -= MainFrom_FormClosed;
       Thread.Sleep(10);
 
       if (weightSerialPort.IsOpen)
@@ -233,7 +233,7 @@ namespace BWP.WinFormControl
       Value = 0;
     }
 
-    private void MainFrom_FormClosing(object sender, FormClosingEventArgs e)
+    private void MainFrom_FormClosed(object sender, FormClosedEventArgs e)
     {
       if (!enableWeightBox.Checked)
         return;