I'm trying to make a forge server. I've got everything downloaded and working, but I want to add more ram to the server since it's at less than 1gb. So I try to make a start.bat like this "java -Xmx 8gb -Xms 5gb -jar forge-1.12.2-14.23.5.2768-universal.jar nogui", but when I try to open it, it opens a command prompt and instantly closes it. Can someone help?