I'm from Germany. Please excuse my writingerrors.
I have the same Error-411-problem with Sticky Notes and the activation of my Evernote account. I get in contact with Evernote-facebook, they are sorry, because they can do nothing?! The error 411 ist an Error of Sticky Notes?! I thought that an Evernote-Server sends the activation link for my Evernote account. Or is it an Sticky Notes Server? I only want to understand and also it seems that Sticky Notes and the site: http://stickynotes.edo-soft.com/ does not exist anymore. So, by the way, there is also no support to get in contact?!
Are You sure that it is an Sticky Notes Server which sends the activation link for an Evernote account? Because I get an activation link for (from?) google drive. Without the error 411. I can also synchronize Sticky Notes with my Google Drive account. When it is an Sticky Notes Server error, why it make trouble with the Evernote account and not with the Google Drive account. Because of this i think that it is an Error of the Evernote-Server. Am I right? If not, why?