jar in webapp lib(iBatis related) is log to conf/server.log

[willng]

I use JBoss4
delpoy a XXX.war and the webapp has it own log4j.xml
all my self-developed class can successfully write to the log file through my log4j.xml
but the log in the WEB-INF/lib/xxxx.jar file of iBatis is written to the server.log
I search in web and find that this is related to the class loading issue.
anyone can tell me how to config the jboss so that the *.jar in my webapp lib can use my self log4j.xml as logging config.

Thanks in advance

[willng]

remind that I use the latest version JBoss 4.0.3 SP1
it use tomcat for delpoy webapp
is it valid to use the below method that I find from
http://wiki.jboss.org/wiki/Wiki.jsp?page=Logging

Drop log4j.jar in your myapp.war/WEB-INF. Make the change in jboss-web.xml for class-loading, as shown in the section above. In this case, myapp.war/WEB-INF/jboss-web.xml looks like this:
<jboss-web>
<class-loading java2ClassLoadingCompliance="false">
<loader-repository>
myapp:loader=myapp.war
<loader-repository-config>java2ParentDelegation=false</loader-repository-config>
</loader-repository>
</class-loading>
</jboss-web>