Websphere 6.1 perfServlet error

Hi,
i'm writing a client that suppose to get information on the WAS through perfServlet
but when i try to call it with "module=beanModule" i get an error:

]]>Error retrieving PMI data. java.lang.Exception: Unable to find the module(s) specified: beanModule at com.ibm.ws.pmi.perfServlet60.PerformanceServlet.doPost(Unknown Source) at com.ibm.ws.pmi.perfServlet60.PerformanceServlet.doGet(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:743) at javax.servlet.http.HttpServlet.service(HttpServlet.java:856) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:989) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:501) at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:464) at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:321) at com.ibm.ws.pmi.perfServlet60.ControllerServlet.doPost(Unknown Source) at com.ibm.ws.pmi.perfServlet60.ControllerServlet.doGet(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:743) at javax.servlet.http.HttpServlet.service(HttpServlet.java:856) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:989) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:501) at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:464) at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:90) at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:744) at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1433) at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:112) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:454) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:383) at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:102) at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165) at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217) at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161) at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136) at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:195) at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:743) at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:873) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1469)</Comments>
</PerformanceMonitor>

i tried to download the lates fix from IBM and it didn't help, any suggestions?
thanks.

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I managed to solve the problem.
one must actually activate an EJB in order for this module to be available.
it's not enough to just install it on the WAS.

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