He did not provide the solution, but I can.

First and foremost, you need to navigate cmd and open the file from there and it will remain open long enough for you to see the issue.

CMD usually starts in your user folder, so as an example if you saved your .bat file in a folder called miner on your desktop you would write this (note that every space is an enter)

cd desktop
cd minerfile
start minerbat.bat

Starting the ,bat in CMD allows you to keep it open. When its open you can read that there may be an error in your file. Establish what the error might be, then re-try.

Just so you're aware - the CMD closing when it finishes reading is actually a typical function of windows, but it's not very handy that its defaulted to this when you need to read what comes up.