Oracle Workflow配置问题：无效连接
在winxp上成功安装oracle workflow，点击Workflow Configuration Assistant工具进行配置。出现java.lang.Exception: Invalid connection (0)错误。请问这是什么原因啊?怎么解决？
日志如下：
Workflow Configuration Assistant 2.6.4.0.0 - Windows XP
WFCA Version: : WorkflowCA.java 26.106 2005/06/29 04:33
WorkflowCA:
WorkflowCA: 正在进行工作流配置...
WorkflowCA: Wed Sep 19 09:26:04 CST 2007
WorkflowCA:
WorkflowCA: Screen width -1024-, screen height -768-
WorkflowCA:
WorkflowCA: 图形用户界面模式
WorkflowCA:
WorkflowCA:
WorkflowCA: 开始测试连接, 这需要不到 3 分钟的时间。
WorkflowCA:
WorkflowCA: 为以下操作进行帐户连接测试: SYS
WorkflowCA: SYS 帐户连接成功。
WorkflowCA: 内嵌的 Workflow 检查已成功完成
WorkflowCA: 工作流方案已存在, Workflow Configuration Assistant 将升级现有的方案。
WorkflowCA:
WorkflowCA: 为以下操作进行帐户连接测试: 工作流
WorkflowCA: 无法连接到jdbcracle:thin(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=orcl)))
java.lang.Exception: Invalid connection
at oracle.apps.fnd.wf.install.db.WorkflowCA.createJDBCConnection(WorkflowCA.java:4802)
at oracle.apps.fnd.wf.install.db.WorkflowCA.createWFConnection(WorkflowCA.java:4871)
at oracle.apps.fnd.wf.install.db.WorkflowCA.schemaCreation(WorkflowCA.java:1139)
at oracle.apps.fnd.wf.install.db.WfFrame.actionPerformed(WfFrame.java:2051)
at oracle.ewt.button.PushButton.processActionEvent(Unknown Source)
at oracle.ewt.lwAWT.LWButton.processActionEvent(Unknown Source)
at oracle.ewt.button.PushButton.processEventImpl(Unknown Source)
at oracle.ewt.lwAWT.LWComponent.redispatchEvent(Unknown Source)
at oracle.ewt.lwAWT.LWComponent.processEvent(Unknown Source)
at oracle.ewt.button.PushButton.activate(Unknown Source)
at oracle.ewt.lwAWT.AbstractButton.processMouseReleased(Unknown Source)
at oracle.ewt.lwAWT.AbstractButton.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Component.java:4897)
at java.awt.Container.processEvent(Container.java:1569)
at oracle.ewt.lwAWT.LWComponent.processEventImpl(Unknown Source)
at oracle.ewt.button.PushButton.processEventImpl(Unknown Source)
at oracle.ewt.lwAWT.LWComponent.redispatchEvent(Unknown Source)
at oracle.ewt.event.tracking.GlassMouseGrabProvider$Disp._redispatchEvent(Unknown Source)
at oracle.ewt.event.tracking.GlassMouseGrabProvider$Disp._redispatchEvent(Unknown Source)
at oracle.ewt.event.tracking.GlassMouseGrabProvider$Disp.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Component.java:5100)
at oracle.ewt.lwAWT.LWComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Component.java:4897)
at java.awt.Container.processEvent(Container.java:1569)
at oracle.ewt.lwAWT.LWComponent.processEventImpl(Unknown Source)
at oracle.ewt.event.tracking.GlassMouseGrabProvider$Proxy.processEventImpl(Unknown Source)
at oracle.ewt.lwAWT.LWComponent.redispatchEvent(Unknown Source)
at oracle.ewt.lwAWT.LWComponent.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Component.java:3615)
at java.awt.Container.dispatchEventImpl(Container.java:1627)
at java.awt.Component.dispatchEvent(Component.java:3477)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3483)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3198)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)
at java.awt.Container.dispatchEventImpl(Container.java:1613)
at java.awt.Window.dispatchEventImpl(Window.java:1606)
at java.awt.Component.dispatchEvent(Component.java:3477)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
WorkflowCA: Wed Sep 19 09:27:05 CST 2007
WorkflowCA: java.lang.Exception: Invalid connection (0)
WorkflowCA: Terminating...