WAS 6.1 perfServlet error

Hi,
i'm trying to get info from the perfServlet on WAS 6.1, but when i try the "module=beanModule" i get an error:

<PerformanceMonitor responseStatus="failed" version="6.1.0.9">
<Comments>
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 downloading the latest fix from IBM's site, but it didn't help.
any suggestions?
thanks.