Log file doesn't create in Log 4j with JSF 2

Log file doesn't create in Log 4j with JSF 2

I have created Web Application by using JSF 2.0, Log 4j 1.2.14 and JBoss
7. When I run testcase, the log file is created. And the log file can't
create when I run web application.
I there is anything I need to configur, please tell me.