I have followed a couple different steps to make a server and both times when I make it, I launch and the cmd.exe pops up for less than a second and closes.
My pack URL: http://www.technicpack.net/api/modpack/mrfluffypig-pack
I followed the steps it says to do, but when I click launch the command window pops up for less than a second then closes. I don't know how to fix it, I've tried deleting it all and redoing it and it didn't help.