I have port fowarded before and got my server working numerous times.
However, i just got a new modem today. DI-514.
I used Port Forward Checker to see if the port is open. It says it is open!
However, when i try to connect to my own server. It gets stuck on the connecting screen and eventually tells me that the server could of shutdown.
My server does show up on the server list. If that means anything.