帮忙看看jboss数据源错误：You have not defined a jta-data-source for a JTA enabled persistence context named: DefaultDS
15:50:49,046 INFO [JmxKernelAbstraction] installing MBean: jboss.j2ee:jar=test3.jar,name=AdminBean,service=EJB3 with dependencies:
15:50:49,046 INFO [JmxKernelAbstraction] persistence.units:jar=test3.jar,unitName=DefaultDS
15:50:49,046 INFO [EJB3Deployer] Deployed: file:/D:/jboss-4.0.5.GA/server/all/deploy/test3.jar
15:50:49,046 ERROR [URLDeploymentScanner] Incomplete Deployment listing:

--- MBeans waiting for other MBeans ---
ObjectName: persistence.units:jar=test3.jar,unitName=DefaultDS
  State: FAILED
  Reason: java.lang.RuntimeException: You have not defined a jta-data-source for a JTA enabled persistence context named: DefaultDS
  Depends On Me:
  jboss.j2ee:jar=test3.jar,name=AdminBean,service=EJB3

ObjectName: jboss.j2ee:jar=test3.jar,name=AdminBean,service=EJB3
  State: NOTYETINSTALLED
  I Depend On:
  persistence.units:jar=test3.jar,unitName=DefaultDS

--- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM ---
ObjectName: persistence.units:jar=test3.jar,unitName=DefaultDS
  State: FAILED
  Reason: java.lang.RuntimeException: You have not defined a jta-data-source for a JTA enabled persistence context named: DefaultDS
  Depends On Me:
  jboss.j2ee:jar=test3.jar,name=AdminBean,service=EJB3


------解决方案--------------------
提示我的主要错误是：You have not defined a jta-data-source for a JTA enabled persistence context named: DefaultDS

但是我已经定义了。。。啊。。

如果没有persistence.xml文件时，即不用entitybean时没问题，
加上了这个文件与数据源打交道时就出错了/。。。
哪位高手帮帮忙看看 了。。