Disallow changing a plug-in's supporting plug-in checkbox if the plug-in is locked.
diff --git a/1.5/plugins/org.eclipse.epf.authoring.ui/src/org/eclipse/epf/authoring/ui/forms/MethodPluginDescriptionPage.java b/1.5/plugins/org.eclipse.epf.authoring.ui/src/org/eclipse/epf/authoring/ui/forms/MethodPluginDescriptionPage.java
index cd380e2..d78cf52 100644
--- a/1.5/plugins/org.eclipse.epf.authoring.ui/src/org/eclipse/epf/authoring/ui/forms/MethodPluginDescriptionPage.java
+++ b/1.5/plugins/org.eclipse.epf.authoring.ui/src/org/eclipse/epf/authoring/ui/forms/MethodPluginDescriptionPage.java
@@ -440,6 +440,9 @@
 	protected void refresh(boolean editable) {
 		super.refresh(editable);
 		ctrl_r_brief_desc.setEditable(false);
+		if(supportingPluginCheckbox != null) {
+			supportingPluginCheckbox.setEnabled(editable);
+		}
 	}
 	
 	@Override