MySQL 这样连接为何出现这样的错误

大家好，小弟初学JSP,在连接数据库的时候遇到了一个奇怪的问题，希望大家能帮我解决一下，在这儿，先谢过大家了：
我用的一些工具的版本如下：
 Tomcat        5.0.28
 MySQL          5.0.27
 MySQL 的驱动  mysql-connector-java-5.0.4
 这是我环境变量的配置：Classpath=D:\Program Files\Java\mysqljdbc\mysql-connector-java-5.0.4-bin.jar;
%JAVA_HOME%\lib\mysql-connector-java-5.0.4-bin-g.jar;.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar;C:\Program Files\Apache Software Foundation\Tomcat 5.0\common\lib\servlet-api.jar;E:\ServletAndJSPDev;
另外我把Mysql的 驱动程序版本是：mysql-connector-java-5.0.4
安装到了%JAVA_HOME%\lib\mysql-connector-java-5.0.4-bin-g.jar；
    和  D:\Program Files\Java\mysqljdbc\mysql-connector-java-5.0.4-bin.jar;还有我把 驱动程序的两个 .jar 文件拷贝到了 tomcat 安装目录的commmon\lib\这样之后我启动 Tomcat 在我的test.jsp 中只有这样的几行代码：<%@ page language="java" contentType="text/html; charset=utf-8"%>
<%@ page info="database handler" %>
<%@ page import="java.io.*" %> 
<%@ page import="java.sql.*" %>   
<%@ page import="javax.servlet.*" %>
<%@ page import="javax.servlet.http.*" %>
<% 
  Class.forName("org.gjt.mm.mysql.Driver").newInstance();
%>可是在运行的时候却报告这么一个错误：type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception javax.servlet.ServletException: org/aspectj/lang/Signature
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.dd_jsp._jspService(dd_jsp.java:64)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause java.lang.NoClassDefFoundError: org/aspectj/lang/Signature
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Class.java:164)
org.apache.jsp.dd_jsp._jspService(dd_jsp.java:57)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.