【DWR3】报错：Failed to find parameter: c0-scriptName

16:35:16,250  WARN BaseCallHandler:380 - Exception while processing batch
java.lang.IllegalArgumentException: Failed to find parameter: c0-scriptName
at org.directwebremoting.dwrp.Batch.extractParameter(Batch.java:91)
at org.directwebremoting.dwrp.CallBatch.parseParameters(CallBatch.java:108)
at org.directwebremoting.dwrp.CallBatch.<init>(CallBatch.java:47)
at org.directwebremoting.dwrp.BaseCallHandler.handle(BaseCallHandler.java:72)
at org.directwebremoting.servlet.UrlProcessor.handle(UrlProcessor.java:120)
at org.directwebremoting.servlet.DwrServlet.doPost(DwrServlet.java:141)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
====================我在页面 引入 <script type="text/javascript" src="<%=path%>/dwr/engine.js"></script>就报上面那个错误dwr的版本是 3.0  的 有人知道如何解决吗   谢谢， 在线等 ， 搞了一下午了 郁闷！！！！