Did the install as per instructions, but the VPN and dynamic DNS don't work according to the control panel web page. (picture below)

As a side note, that "Check Now" link for the VPN doesn't seem to do anything at all.
I did the port forwarding on the router (both the default UDP and also the alternative TCP port forwarding), no success. And I tried both of these options with my router (D-link dir 655) acting as the DHCP server, and also with Amahi acting as DHCP.
Any ideas? I really want to get these feature working on my old test box... because I have big plans to build a real server on newer hardware.