我在flex中写了一个测试函数，调用java中的一个方法，remoteObject.test()。为什么java 后台一直提示
Unable to instantiate Action, amf, defined for *amf* in namespace */*amf
at com.opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:316)
at com.opensymphony.xwork2.DefaultActionInvocation.init(DefaultActionInvocation.java:397)
at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:194)
at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63)
求助呀，困扰好久了....