jbpm4.4 spring3.0 hibernate 集成错误 急！急！急！could not initialize proxy - no Session
<bean id="springHelper" />
<bean id="processEngine" factory-bean="springHelper" factory-method="createProcessEngine" />

<!-- 流程定义及管理 -->
<bean id="repositoryService" factory-bean="processEngine"
factory-method="getRepositoryService" />

<!-- 控制流程实例 -->
<bean id="executionService" factory-bean="processEngine"
factory-method="getExecutionService" />

<bean id="historyService" factory-bean="processEngine"
factory-method="getHistoryService" />

<bean id="managementService" factory-bean="processEngine"
factory-method="getManagementService" />

<bean id="identityService" factory-bean="processEngine"
factory-method="getIdentityService" />

<bean id="taskService" factory-bean="processEngine"
factory-method="getTaskService" />

当调用repositoryService.deleteDeploymentCascade(cmsWorkflowdeploy.getDeployId());方法时：
[CONSOLE_INFO] 2011-02-21 13:29:11,687 - org.hibernate.LazyInitializationException -86953 [http-8088-7] ERROR org.hibernate.LazyInitializationException - could not initialize proxy - no Session
org.hibernate.LazyInitializationException: could not initialize proxy - no Session

困扰了我三天了，一直没有找到一个合适的解决方法，您能提供点建议么？谢谢！期待您能快些回复....... 急！急！急！