removeClassLoader operation in jmx console

[Julien Martin]

Hello,
I would like to invoke the removeClassLoader operation in the jmx console (LoaderRepository service). I do not know what to pass as an argument. I tried com.mycompany.MyLibrary and I get this:

HTTP Status 500 - 
 
type Exception report
message 
description The server encountered an internal error () that prevented it from fulfilling this request.
exception 
javax.servlet.ServletException: Failed to invoke operation
org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.invokeOp(HtmlAdaptorServlet.java:248)
org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.processRequest(HtmlAdaptorServlet.java:79)
org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.doPost(HtmlAdaptorServlet.java:61)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:75)
root cause 
javax.management.IntrospectionException: Failed to find PropertyEditor for type: java.lang.ClassLoader
org.jboss.jmx.adaptor.control.Server.invokeOpByName(Server.java:230)
org.jboss.jmx.adaptor.control.Server.invokeOp(Server.java:202)
org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.invokeOp(HtmlAdaptorServlet.java:241)
org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.processRequest(HtmlAdaptorServlet.java:79)
org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.doPost(HtmlAdaptorServlet.java:61)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:75)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.
 
Apache Tomcat/5.0.28

Can anyone help?

Thanks in advance,