Copying notes from leads

Hello, I've been following this guide to create an iframe that displays the originating leads' notes: http://blog.marksgroup.net/2012/05/mscrm-2011-copying-notes-from-lead-to.html

The script works fine when I turn on turbo forms, but does not work when I go back to the old legacy forms and gives me a 404 error (I need to use legacy forms). This particular line seems to the issue:

src = "/" + context.getContext().getOrgUniqueName() + "/_controls/notes/notesdata.aspx?id=" + lookupItem[0].id + "&ParentEntity=3&EnableInlineEdit=false&EnableInsert=false";

An example string that is generates is:

/org********/_controls/notes/notesdata.aspx?id={********-****-****-****-************}&ParentEntity=3&EnableInlineEdit=false&EnableInsert=false

 Is there something I should change in this line? It works when I just enter in "about:blank" but not with the string generated above.

Thanks in advance.