jBPM example: customTaskInstance fails with this exception:

See: http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088401#4088401

java.lang.ClassCastException: org.jbpm.taskmgmt.exe.TaskInstance
at org.jbpm.taskinstance.CustomTaskControllerHandler.initializeTaskVariables(CustomTaskControllerHandler.java:66)
at org.jbpm.taskmgmt.def.TaskController.initializeVariables(TaskController.java:82)
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.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:157)
at org.jbpm.taskmgmt.def.TaskController$$EnhancerByCGLIB$$1af08496.initializeVariables(<generated>)
at org.jbpm.taskmgmt.exe.TaskInstance.initializeVariables(TaskInstance.java:145)
at org.jbpm.taskmgmt.exe.TaskMgmtInstance.createTaskInstance(TaskMgmtInstance.java:136)
at org.jbpm.graph.node.TaskNode.execute(TaskNode.java:168)
at org.jbpm.graph.def.Node.enter(Node.java:319)
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.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:157)
at org.jbpm.graph.def.Node$$EnhancerByCGLIB$$55e0744d.enter(<generated>)
at org.jbpm.graph.def.Transition.take(Transition.java:151)
at org.jbpm.graph.def.Node.leave(Node.java:394)
at org.jbpm.graph.node.StartState.leave(StartState.java:70)
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.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:157)
at org.jbpm.graph.def.Node$$EnhancerByCGLIB$$55e0744d.leave(<generated>)
at org.jbpm.graph.exe.Token.signal(Token.java:195)
at org.jbpm.graph.exe.Token.signal(Token.java:140)
at org.jbpm.taskinstance.CustomTaskInstanceTest.createNewProcessInstance(CustomTaskInstanceTest.java:162)
at org.jbpm.taskinstance.CustomTaskInstanceTest.testCustomTaskInstance(CustomTaskInstanceTest.java:125)
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 junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)

<classpathentry kind="lib" path="/opt/GA/jboss-soa-p-standalone.4.2.0/jbpm-jpdl/jbpm-jpdl.jar"/>
<classpathentry kind="lib" path="/opt/GA/jboss-soa-p.4.2.0/seam/lib/jbpm-3.1.4.jar"/>
<classpathentry kind="lib" path="/opt/GA/jboss-soa-p-standalone.4.2.0/jbpm-jpdl/lib/hibernate3.jar"/>
<classpathentry kind="lib" path="/opt/GA/jboss-soa-p-standalone.4.2.0/jbpm-jpdl/lib/dom4j.jar"/>
<classpathentry kind="lib" path="/opt/GA/jboss-soa-p-standalone.4.2.0/jbpm-jpdl/jbpm-identity.jar"/>