Hello if you are playing modded minecraft with forge and it says ":shutting down internal server" This means you need to remove a single file, that when you removes comes back when you close and reopen minecraft, In this post I will tell you how to fix this problem. First go to %APPDATA% Click on .minecraft, Find the file options.TXT or sometimes just options, Remove options.txt from your computer. It may insert itself back in if so remove the file again, And again, And again, And Again. You get it. I hope this was help for anyone having the same problem that I was having with mods.