Hey, I followed your steps on port-forwarding. SDS worked and I could join it (LAN connections too) but friends at their homes couldn't.
I know where it went wrong is port forwarding because it's the part I hate most.
I have a screenshot that summarises what I did on here: http://imagefrog.net/show.php/154513_port.JPG
Please contact me on: email@example.com
If it is possible.
If this gets fixed I will give you admin over my server <3 :) thanks.