Aglet运行时出错，求救

运行agletsd，出现Tahiti。创建examples.hello.HelloAglet后，点击“go”运行后，出现如下错误
java.security.AccessControlException: access denied (com.ibm.aglets.security.MessagePermission aglet_key starttrip) 
        at java.security.AccessControlContext.checkPermission(AccessControlConte
xt.java:264)
        at java.security.AccessController.checkPermission(AccessController.java:
427)
        at com.ibm.aglets.AgletContextImpl.checkPermission(Unknown Source)
        at com.ibm.aglets.LocalAgletRef.checkPermission(Unknown Source)
        at com.ibm.aglets.LocalAgletRef.checkMessagePermission(Unknown Source)
        at com.ibm.aglets.LocalAgletRef.checkMessagePermissionAndProtection(Unkn
own Source)
        at com.ibm.aglets.LocalAgletRef.cloneMessageAndCheck(Unknown Source)
        at com.ibm.aglets.LocalAgletRef.sendOnewayMessage(Unknown Source)
        at com.ibm.aglets.AgletProxyImpl.sendOnewayMessage(Unknown Source)
        at examples.hello.MyDialog.actionPerformed(Unknown Source)
        at java.awt.Button.processActionEvent(Button.java:388)
        at java.awt.Button.processEvent(Button.java:356)
        at java.awt.Component.dispatchEventImpl(Component.java:3955)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:242)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:163)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
这是怎么回事呢？请大家多多指教。