Monitoring the memory usage of a JRUN instance

Hi,

I have successfully set up a JMX [MX4J / JDK1.5] monitor to monitor a JRUN instance. The primary reason for doing this was to alert us when the Heap grew past a certain size. Unfortunately I have been unable to get out the information I wanted using Applications Manager.

I have set up a custom attribute using JRUN's java.lang.Memory MBean and chosen the HeapMemoryUsage attribute. All I get from this is the value "javax.management.openmbean.CompositeDataSupport". I can view the same attribute using java's jconsole, but with jconsole I can double click on the value and see more information ['used' is the data I'm interested in]. I can also select the memory tab in jconsole to view how the heap memory usage changes over time. Is there any way I can get this same information through Applications Manager in order to alert when it reaches a certain threshold?