So appreciate all the attempted support for this guy.  But we have dozens and dozens of Masternodes running out there with no issue using the exact directions specified.  We have several running now ourselves.  While I cannot see anything wrong with what you are doing, there is obviously some flaw in your setup, firewall, configuration, etc. that has gone overlooked since every one else used the same document and seem to have their MN running fine and we can see many active out there.