How to use log4j in an EJB Module??

I have included the log4j.jar in libraries;
added log4j.xml in the sources folder;
but I m getting an error:
<Apr 22, 2014 11:07:50 AM PKT> <Warning> <EJB> <BEA-010065> <MessageDrivenBean threw an Exception in onMessage(). The exception is:
java.lang.NoClassDefFoundError: org/apache/log4j/Logger.
java.lang.NoClassDefFoundError: org/apache/log4j/Logger
    at test.MyMessageBean.onMessage(MyMessageBean.java:39)
    at weblogic.ejb.container.internal.MDListener.execute(MDListener.java:575)
    at weblogic.ejb.container.internal.MDListener.transactionalOnMessage(MDListener.java:477)
    at weblogic.ejb.container.internal.MDListener.onMessage(MDListener.java:375)
    at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:4855)
    Truncated. see log file for complete stacktrace
Kindly guide me how to resolve this???
Thank you!

"I have included the log4j.jar in libraries" -> what does that actually mean? What steps did you take and where?
Because one thing is for certain: the jar is not deployed to the proper location so it is on the application's classpath or else you wouldn't be running into this issue.

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