struts module ClassCastException

2004-07-21 15:35:06 action: null
java.lang.ClassCastException
        at org.apache.struts.action.ActionServlet.initModulePlugIns(ActionServle
t.java:1142)
        at org.apache.struts.action.ActionServlet.init(ActionServlet.java:486)
        at javax.servlet.GenericServlet.init(GenericServlet.java:256)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:918)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:810)
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3279)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:3421)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:638)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123)
        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:343
)
        at org.apache.catalina.core.StandardService.start(StandardService.java:388)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:506)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:781)
        at org.apache.catalina.startup.Catalina.execute(Catalina.java:681)
        at org.apache.catalina.startup.Catalina.process(Catalina.java:179)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243)

2004-07-21 15:35:06 StandardWrapper[/yourmodule:action]: Marking servlet action as unavailable
2004-07-21 15:35:06 StandardContext[/yourmodule]: Servlet /yourmodule threw load() exception