求求教高手！！！！！！


下面是我写的一个简单登录界面：用户名和密码都保存在文件中。总是出现异常说是３７行有错，但是就是没有找到。。符号都是对的
异常：
type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: Exception in JSP: /Login.jsp:3734:                     out.print(code+"<BR>");
35:                     out.print(usercode+"<BR>");
36:                     
37:                     if(username.equals(name)&&usercode.equals(code))
38:                         out.print("Log In Successly");
39:                     else
40:                         out.print("Log In Failed");代码：
<%@page contentType="text/html" import="java.io.*"%>
<%@page pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>简单的用户登录界面</title>
    </head>
    <body>
        <form action="Login.jsp" method="post">
            <table border="1" cellspacing="1" cellpadding="4" width="80%" align="center">
                <tr bgcolor="pink"><td colspan="2"><font color="blue">会员登录</font></td></tr>
                <tr><td  width="21%">用户名:</td>
                <td width="59"><input type="text" name="username"></td></tr>
                <tr><td  width="21%">密码:</td>
                <td width="59"><input type="password" name="usercode"></td></tr>
            </table>
            <center><input type="submit" name="loginsubmit" value="会员登录"></center>
            
            <% String username=request.getParameter("username");
            String usercode=request.getParameter("usercode");
            try{
                File f=new File("E:\\users","student.txt");
                FileReader in=new FileReader(f);
                BufferedReader BufferIn=new BufferedReader(in);
                String name="ok",code="ok";
                
                while((name=BufferIn.readLine())!=null){
                    code=BufferIn.readLine();
                    
                    out.print(name+"<BR>");
                    out.print(username+"<BR>");
                    out.print(code+"<BR>");
                    out.print(usercode+"<BR>");
                    
                    if(username.equals(name)&&usercode.equals(code))
                        out.print("Log In Successly");
                    else
                        out.print("Log In Failed");
                    
                    
                }
                
                BufferIn.close();
                in.close();
            }catch(IOException ee){}%>    
            
        </form>
        
    </body>
</html>