Windows 7 prof 64bit
installed and Setup DDNS correctly as per all steps in Tutorial. on Host

Last step in Tutorial
On remote computer
Open windows Remote Desktop Connection. I enter my xxxxxx.dnyu.net
but password not working. Tried every password but still not able to connect.

The username and password to connect to the remote computer is the Microsoft account username and password you use to log onto that computer, which is not related to your Dynu hostname or account.