Any idea why Weblogic throw this: java.lang.NoSuchMethodError .. On my ActionServlet?

[Trieu, Danny]

<Aug 20, 2002 2:38:54 PM PDT> <Error> <HTTP> <101018>
<[ServletContext(id=8303299,name=onlinebanking,context-path=/onlin
ebanking)] Servlet failed with ServletException
javax.servlet.ServletException:
[ServletContext(id=8303299,name=onlinebanking,context-path=/onlinebanking)]:
Servlet cla
ss org.apache.struts.action.ActionServlet for servlet ActionServlet could
not be handled by the ClassLoader with classpa
th
D:\opt\weblogicapps\onlinebanking\.\applications\onlinebanking\WEB-INF\class
es.
java.lang.NoSuchMethodError
        at
weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.jav
a:723)
        at
weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.java:44
7)
        at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:287)
        at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:242)
        at
weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(W
ebAppServletContext.java:5363)
        at
weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManage
r.java:721)
        at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
ntext.java:3043)
        at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
:2466)
        at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:152)
        at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:133)

I was using WebLogic7.0 with Struts1.1b2

Thanks,

danny