Hello Mario,
welcome to the forum.
To help you it will be necesarry that you provide a bit more information. What OS (if you use .bat it should be Windows but which) and what version of JBoss AS7?
Is it a fresh download without changes?
What you might do is to change the first line of the standalone.bat, replace @echo off => @echo on. You will see more details about the executed batch script.
If you not sure what goes wrong you can attach the output of the command.