Hello, I'm quite new to jBPM.

I wrote such part of code

JbpmConfiguration jbpmConfiguration = JbpmConfiguration.getInstance();
 JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();
 try {
 TaskInstance ti = jbpmContext.loadTaskInstanceForUpdate(taskID);
 // do something
 ti.end();
 }
 finally {
 jbpmContext.close();
 }

Here after task instance is finished, process instance must end.
As I understand, jbpmContext saves task instance and then process instance attempts to be saved to. But following error occurs:

16:08:22,015 ERROR [EjbSchedulerService] javax.naming.NameNotFoundException: ejb not bound
16:08:22,015 ERROR [GraphElement] action threw exception: ejb local timer lookup problem
org.jbpm.JbpmException: ejb local timer lookup problem
 at org.jbpm.scheduler.ejbtimer.EjbSchedulerService.<init>(EjbSchedulerService.java:34)
 at org.jbpm.scheduler.ejbtimer.EjbSchedulerServiceFactory.openService(EjbSchedulerServiceFactory.java:11)
 at org.jbpm.svc.Services.getService(Services.java:144)
 at org.jbpm.svc.Services.getCurrentService(Services.java:91)
 at org.jbpm.graph.exe.ProcessInstance.end(ProcessInstance.java:329)
 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.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173)
...
...
...

In jbpm.cfg.xml settings are:

 <service name="persistence">
 <factory>
 <bean class="org.jbpm.persistence.db.DbPersistenceServiceFactory">
 <field name="isCurrentSessionEnabled">
 <true/>
 </field>
 </bean>
 </factory>
 </service>

In hibernate.cfg.xml are:

 <property name="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property>
 <property name="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.JBossTransactionManagerLookup</property>
 <property name="jta.UserTransaction">java:comp/UserTransaction</property>

Anyone knows why it is?