axis配置有问题，求救

按http://www-900.ibm.com/developerWorks/cn/webservices/ws-startaxis/这篇文章的介绍，我配置axis，但出现如下错误和提示：
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Error: could not find class javax.xml.soap.SOAPMessage from file saaj.jar
Axis will not work
See http://xml.apache.org/axis/


Error: could not find class javax.xml.rpc.Service from file jaxrpc.jar
Axis will not work
See http://xml.apache.org/axis/


Error: could not find a dependency of class org.apache.axis.transport.http.AxisServlet from file axis.jar
Axis will not work
See http://xml.apache.org/axis/
The root cause was: org.apache.axis.transport.http.AxisServletBase
This can happen e.g. if org.apache.axis.transport.http.AxisServlet is in the 'common' classpath, but a dependency like activation.jar is only in the webapp classpath.
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我找了下axis下lib文件夹中的saaj.jar、jaxrpc.jar、axis.jar包，解开后里面都有上述提到的“找不到”的class，怎么说找不到？？？

还有，最后的错误提示里：org.apache.axis.transport.http.AxisServletBase也在的，但下一句它说“org.apache.axis.transport.http.AxisServlet is in the 'common' classpath, but a dependency like activation.jar is only in the webapp classpath.”是什么意思？axis.jar、activation.jar都在D:\programtool\Apache Tomcat 4.0\webapps\axis\WEB-INF\lib目录下的呀，怎么回事？