Since the crash the dyndns don't seem to be working. It's being worked on but no ETA at this time.
What you can do is 1) enter your public IP in the static IP box AND 2) check the "dynamic" box. You must do both. Then when your IP changes, all you will need to do is update your graph with the new IP. After updating your IP address, make sure you click on the "Update Monitor" at the bottom to save the info.
Hope this helps you and others who are having this problem.