editor bug custom filed

If you add a Wysing editor in the custom field, I’ve found a bug that can not insert ads in place of Wysing editor that you have added.
version 1.7.61
======

$ diff -u sam-dialog.js.org sam-dialog.js
--- sam-dialog.js.org	2013-10-23 20:13:03.000000000 +0900
+++ sam-dialog.js	2013-10-23 20:09:42.000000000 +0900
@@ -22,7 +22,7 @@
   if(samItem == 1) samCode += ' name="' + samIdObj.options[samIdObj.selectedIndex].text + '"'
   if(samBA == 1) samCode += ' codes="true"]';
   else samCode += ']';
-	window.tinyMCE.execInstanceCommand('content', 'mceInsertContent', false, samCode);
+	window.tinyMCE.execInstanceCommand(window.tinyMCE.activeEditor.id, 'mceInsertContent', false, samCode);
 	tinyMCEPopup.editor.execCommand('mceRepaint');
 	tinyMCEPopup.close();
 	return;
@@ -46,7 +46,7 @@
   if(samBA == 1) samCode += ' codes="true"]';
   else samCode += ']';

-  window.tinyMCE.execInstanceCommand('content', 'mceInsertContent', false, samCode);
+  window.tinyMCE.execInstanceCommand(window.tinyMCE.activeEditor.id, 'mceInsertContent', false, samCode);
   tinyMCEPopup.editor.execCommand('mceRepaint');
   tinyMCEPopup.close();
   return;
@@ -70,7 +70,7 @@
   if(samBA == 1) samCode += ' codes="true"]';
   else samCode += ']';

-  window.tinyMCE.execInstanceCommand('content', 'mceInsertContent', false, samCode);
+  window.tinyMCE.execInstanceCommand(window.tinyMCE.activeEditor.id, 'mceInsertContent', false, samCode);
   tinyMCEPopup.editor.execCommand('mceRepaint');
   tinyMCEPopup.close();
   return;
@@ -92,7 +92,7 @@
   if(samItem == 1) samCode += ' name="' + samIdObj.options[samIdObj.selectedIndex].text + '"'
   samCode += ']';

-  window.tinyMCE.execInstanceCommand('content', 'mceInsertContent', false, samCode);
+  window.tinyMCE.execInstanceCommand(window.tinyMCE.activeEditor.id, 'mceInsertContent', false, samCode);
   tinyMCEPopup.editor.execCommand('mceRepaint');
   tinyMCEPopup.close();
   return;

http://wordpress.org/plugins/simple-ads-manager/