Nyroc

I wanted to set up a server for me and my friend to play on. We already have a world on one of his 2 computers, and the server there is working fine, however no computer other than one of his 2 can connect to the server. HOWEVER that is not the problem. Upon deciding to create my own server and hopefully import our old word, i encountered a bug. Whenever i click on launch.bat it displays that in order to continue i have to press any button, but whenever i do it just closes. Please help!