jsp连接sql server 2000数据库问题

我写了下面的一段程序，测试与数据库的连接．连接未成功．高手们请指点．问题在哪里？
 
 
<%@ page contentType="text/html;charset=gb2312"%> 
<%@ page import="java.sql.*"%> 
<html> 
<body> 
<%Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver")
.newInstance(); 
String 
url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=test"; 
//user,password 分别为数据库的用户名及密码 
String user=" sa"; 
String password=" 111111"; 
Connection conn=DriverManager.getConnection(url,user,password); 
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); 
String sql="select * from userinfo"; 
ResultSet rs=stmt.executeQuery(sql); 
while(rs.next()) {%> 
您的第一个字段内容为:<%=rs.getString(1)%><br> 
您的第二个字段内容为:<%=rs.getString(2)%><br> 
您的第三个字段内容为:<%=rs.getString(3)%><br> 
<%}%> 
<%out.print("数据库连接成功!!!");%> 
<%rs.close(); 
stmt.close(); 
conn.close(); 
%> 
</body> 
</html> type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception javax.servlet.ServletException: [Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]用户 ' sa' 登录失败。
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.test3_jsp._jspService(test3_jsp.java:91)
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.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]用户 ' sa' 登录失败。
com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Source)
com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
com.microsoft.jdbc.sqlserver.tds.TDSRequest.processErrorToken(Unknown Source)
com.microsoft.jdbc.sqlserver.tds.TDSRequest.processReplyToken(Unknown Source)
com.microsoft.jdbc.sqlserver.tds.TDSLoginRequest.processReplyToken(Unknown Source)
com.microsoft.jdbc.sqlserver.tds.TDSRequest.processReply(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(DriverManager.java:512)
java.sql.DriverManager.getConnection(DriverManager.java:171)
org.apache.jsp.test3_jsp._jspService(test3_jsp.java:56)
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.
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