Exception when deploying esb archives through JON

There's a failure when deploying an esb archive (zipped and exploded) through the JON console:

2009-08-18 07:56:27,169 INFO [ResourceFactory.executor-1] (rhq.core.pc.inventory.CreateResourceRunner)- Creating resource through report: CreateResourceReport: ResourceType=[ResourceType[id=0, category=Service, name=JBoss ESB Deployment, plugin=JBossESB]], ResourceKey=[null]
2009-08-18 07:56:27,228 ERROR [ResourceContainer.invoker.nonDaemon-4] (org.rhq.plugins.jmx.MBeanResourceComponent)- Error deploying application for report: CreateResourceReport: ResourceType=[ResourceType[id=0, category=Service, name=JBoss ESB Deployment, plugin=JBossESB]], ResourceKey=[null]
java.lang.NoSuchMethodError: org.rhq.plugins.jbossas.util.FileContentDelegate.createContent(Lorg/rhq/core/domain/content/PackageDetails;Ljava/io/InputStream;Z)V
at org.jbosson.plugins.jbossesb.ESBComponent.esbCreate(Unknown Source)
at org.jbosson.plugins.jbossesb.ESBComponent.createResource(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.rhq.core.pc.inventory.ResourceContainer$ComponentInvocationThread.call(ResourceContainer.java:484)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
at java.util.concurrent.FutureTask.run(FutureTask.java:123)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)
2009-08-18 07:56:32,234 WARN [ResourceFactory.executor-1] (rhq.core.pc.inventory.CreateResourceRunner)- Throwable was found in creation report for request [500051]: java.lang.NoSuchMethodError: org.rhq.plugins.jbossas.util.FileContentDelegate.createContent(Lorg/rhq/core/domain/content/PackageDetails;Ljava/io/InputStream;Z)V - Enable DEBUG logging to see the stack trace.
2009-08-18 07:56:32,235 INFO [ResourceFactory.executor-1] (rhq.core.pc.inventory.CreateResourceRunner)- Sending create response to server: CreateResourceResponse[RequestId=500051, Status=Failure]