Now i've found the Function "TaskService.saveTask(Task)". Using this function after "Task.setAssignee()" works fine for me. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4228495#4228495 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4228495