No One Can Join My Server

I created a server a while a go and used uTorrent to let other people on and it worked for a while... but then just suddenly one day it stopped working and no one could join it unless at my house. If they tried it just said java.net.ConnectException: Connection Refused: no further information: .So then i downloaded Simple Port Forwarding and that worked perfectly for a few days but then it stopped working again. I did update my IP. At the moment whenever i use canyouseeme.org it says No route to host. Whenever i use Simple Port Forwarding's Port Tester it says:

Port: 25565 TCP
Status: Port in use
Open?: Failed