diff --git a/designer_form/src/com/fr/design/mainframe/FormDesigner.java b/designer_form/src/com/fr/design/mainframe/FormDesigner.java
index 465b6588c5..8422bfdb40 100644
--- a/designer_form/src/com/fr/design/mainframe/FormDesigner.java
+++ b/designer_form/src/com/fr/design/mainframe/FormDesigner.java
@@ -198,7 +198,7 @@ public class FormDesigner extends TargetComponent<Form> implements TreeSelection
         ParameterPropertyPane.getInstance().getParameterToolbarPane().populateBean(
                 getParameterArray() == null ? new Parameter[0] : getParameterArray());
         ParameterPropertyPane.getInstance().repaintContainer();
-        EastRegionContainerPane.getInstance().setParameterHeight(ParameterPropertyPane.getInstance().getPreferredSize().height);
+        EastRegionContainerPane.getInstance().setParameterHeight(ParameterPropertyPane.getInstance(this).getPreferredSize().height);
     }
 
    private void removeSame(Parameter[] parameters, List<String> namelist){