diff --git a/designer_form/src/com/fr/design/mainframe/FormParaPane.java b/designer_form/src/com/fr/design/mainframe/FormParaPane.java
index ddf5794c8..732d5632e 100644
--- a/designer_form/src/com/fr/design/mainframe/FormParaPane.java
+++ b/designer_form/src/com/fr/design/mainframe/FormParaPane.java
@@ -1,16 +1,23 @@
 package com.fr.design.mainframe;
 
-import com.fr.design.constants.UIConstants;
 import com.fr.design.ExtraDesignClassManager;
+import com.fr.design.constants.UIConstants;
+import com.fr.design.designer.creator.XCreatorUtils;
+import com.fr.design.fun.CellWidgetOptionProvider;
 import com.fr.design.gui.core.UserDefinedWidgetOption;
 import com.fr.design.gui.core.WidgetOption;
 import com.fr.design.gui.ibutton.UIButton;
 import com.fr.design.gui.ilable.UILabel;
-import com.fr.design.designer.creator.XCreatorUtils;
+import com.fr.design.utils.gui.LayoutUtils;
 import com.fr.form.ui.*;
+import com.fr.general.GeneralContext;
 import com.fr.general.Inter;
+import com.fr.plugin.context.PluginContext;
+import com.fr.plugin.injectable.PluginModule;
+import com.fr.plugin.manage.PluginFilter;
+import com.fr.plugin.observer.PluginEvent;
+import com.fr.plugin.observer.PluginEventListener;
 import com.fr.stable.ArrayUtils;
-import com.fr.design.utils.gui.LayoutUtils;
 
 import javax.swing.*;
 import java.awt.*;
@@ -34,14 +41,33 @@ public class FormParaPane extends JPanel {
     private static final int TOOLTIP_X = 5;
     private static final int TOOLTIP_Y = 10;
     private static Dimension originalSize;
-    private static FormParaPane THIS;
+    
+    private static volatile FormParaPane THIS;
     private java.util.List<WidgetOption> predifinedwidgeList = new ArrayList<WidgetOption>();
     private UIButton predefineButton;
     private FormWidgetPopWindow predifinedWindow;
 
 
     private FormDesigner designer;
-
+    
+    static {
+        GeneralContext.listenPluginRunningChanged(new PluginEventListener() {
+        
+            @Override
+            public void on(PluginEvent event) {
+            
+                THIS = null;
+            }
+        }, new PluginFilter() {
+        
+            @Override
+            public boolean accept(PluginContext context) {
+            
+                return context.contain(PluginModule.ExtraDesign, CellWidgetOptionProvider.XML_TAG);
+            }
+        });
+    }
+    
     public static final FormParaPane getInstance(FormDesigner designer) {
         if(THIS == null) {
             THIS = new FormParaPane();