JDBC 测试连接 SQL SERVER 2000 的一个页面错误，大家帮看看

<%@ page contentType="text/html;charset=GBK"%> <%@ page import="java.sql.*"%> <html> <body> <%Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance(); 
String url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=jspdev"; 
//mydb为数据库 
String user="sa"; 
String password=""; 
Connection conn= DriverManager.getConnection(url,user,password);Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); 
String sql="select * from user_info"; ResultSet rs=stmt.executeQuery(sql); while(rs.next()) {%> 您的第一个字段内容为：<%=rs.getString(1)%> 您的第二个字段内容为：<%=rs.getString(2)%> <%}%> <%out.print("数据库操作成功，恭喜你");%> <%rs.close(); stmt.close(); conn.close(); 
%> </body> </html>出错：
HTTP Status 500 - --------------------------------------------------------------------------------type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: [Microsoft][SQLServer 2000 Driver for JDBC]Error establishing socket.
        org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause javax.servlet.ServletException: [Microsoft][SQLServer 2000 Driver for JDBC]Error establishing socket.
        org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:858)
        org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:791)
        org.apache.jsp._1.sql_005ftest_jsp._jspService(org.apache.jsp._1.sql_005ftest_jsp:98)
        org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Error establishing socket.
        com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Source)
        com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
        com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
        com.microsoft.jdbc.sqlserver.tds.TDSConnection.<init>(Unknown Source)
        com.microsoft.jdbc.sqlserver.SQLServerImplConnection.open(Unknown Source)
        com.microsoft.jdbc.base.BaseConnection.getNewImplConnection(Unknown Source)
        com.microsoft.jdbc.base.BaseConnection.open(Unknown Source)
        com.microsoft.jdbc.base.BaseDriver.connect(Unknown Source)
        java.sql.DriverManager.getConnection(Unknown Source)
        java.sql.DriverManager.getConnection(Unknown Source)
        org.apache.jsp._1.sql_005ftest_jsp._jspService(org.apache.jsp._1.sql_005ftest_jsp:56)
        org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)---------------------------------------------------------------------------
      我用的是SQL SERVER 2000 SP3，JDBC SP3，TOMCAT和SQL服务器都在运行，而且TOMCAT可以看主页，看自带的例子，测试这个却出错！
SQL SERVER我新建立了一个数据库叫jspdev，然后在其中建立一个表user_info,写入几个字段Sage等，并且指定了主键，SQL网络实用工具中TCP/IP使用的端口是1433。JDBC的3个东西也拷贝到TOMCAT里了。还有几点不明白，第一：我升级SQL SERVER 2000 SP3后，为什么 查询分析器查到的版本号8.0.149和“关于”里显示的版本号8.0.760不一样呢？第二：JDBC SP3 是可以直接安装还是要在以前的基础上安装？大家帮我分析下，头疼好几天.....