I have never had this problem before. My server IP is angpug1.aternos.me.
I started up my server, joined, but the shutdown counter kept on ticking! It ran all the way to zero, even though I was on. I had my server set to hold 5 people, so I thought you had reverted back to the change where you have to have all slots filled. I set it back and tried again, yet it still shut down. Please help!