TapTrap2090

i am trying to make a server with me and my friends to play on i have installed the forge server, excepted the Eula and added all the mods. i am trying to make a 'server start.bat' file with this command in it java -Xmx2048M -Xms2048M -jar forge-1.12.2-14.23.5.2855.jar nogui but when i run it a command prompt appears and then instantly disappears, can any one help me? in the server folder: